1) Many city governments are investing in electric buses to reduce air pollution. Although the initial cost is high, long-term savings and environmental benefits are clear. Several studies show a decrease in respiratory issues where these buses are used. a) Respiratory issues are caused by pollen and dust. b) City governments are banning gas-powered vehicles. c) Electric buses are expensive but environmentally friendly. d) Public transportation is not very effective in big cities. 2) Arctic foxes change the color of their fur depending on the season. In winter, their fur is white to blend with snow, and in summer it turns brown or gray. This helps them avoid predators and hunt more effectively. a) Arctic foxes can’t survive the summer heat. b) Arctic foxes change fur color to adapt to the environment. c) All animals in the Arctic have white fur. d) Arctic foxes are becoming extinct. 3) Plastic in the ocean harms marine life. Animals often mistake plastic for food or get trapped in it. Reducing plastic use and improving waste management are crucial steps to fix the problem. a) Plastic helps animals find food. b) Oceans are naturally polluted. c) Plastic waste in oceans is dangerous to animals. d) People should stop going to the beach. 4) Volcanoes form when molten rock escapes from inside the Earth. Some volcanoes erupt suddenly, while others remain quiet for centuries. Scientists monitor them closely to warn people in time. a) Volcanoes are always dangerous. b) Volcanoes form from molten rock and require monitoring. c) Scientists can predict every eruption. d) Volcanoes are only found in the Pacific. 5) Some plants can survive without much water by storing it in their stems or leaves. These plants, like cacti, are common in deserts. Their ability to conserve water helps them thrive in dry conditions. a) Desert plants store water to survive in dry environments. b) Cacti need lots of rain to grow. c) Most plants can’t grow in soil. d) Leaves are the most useless part of a plant. 6) Solar panels turn sunlight into electricity, offering a clean energy source. Many homes and businesses are now using solar power to cut costs and reduce pollution. It's one of the fastest-growing energy technologies. a) Solar panels are cheap and easy to break. b) People are moving to the countryside. c) Solar energy is a popular, clean alternative to traditional power. d) Electricity is not important anymore. 7) Some birds fly thousands of miles during migration. They use the sun, stars, and Earth's magnetic field to find their way. This amazing journey helps them find food and better climates. a) Birds migrate because they hate winter. b) Migrating birds are confused and get lost. c) Most birds do not eat during migration. d) Birds rely on nature’s signals for long-distance travel. 8) Coral reefs support many marine species, acting as underwater homes. Pollution and climate change are damaging them quickly. Protecting reefs is essential for ocean biodiversity. a) Coral reefs are mostly empty. b) Climate change is helping reefs grow. c) Coral reefs are vital and need protection. d) Reefs are made of colorful rocks. 9) Bees are key pollinators in many ecosystems. Without them, plants, fruits, and vegetables wouldn't grow as well. Unfortunately, bee populations are dropping due to pesticides and habitat loss. a) Bees are necessary for plant growth and are in danger. b) Bees sting people when angry. c) Bees only live in forests. d) Bees are being replaced by machines.

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