What does a marine ecosystem include?, Only fish and sea animals, Only water and sunlight, Living organisms and non-living elements in the ocean, Only coral reefs, What is one major threat to marine ecosystems mentioned in the speech?, Planting too many trees, Plastic pollution, Clean energy, Recycling, Why are coral reefs called the "rainforests of the sea”?, Because they are very large, Because they produce oil, Because they support a huge variety of marine species, Because they are always green, What can happen if coral reefs are destroyed?, The ocean becomes deeper, Many marine species lose their homes, Fish reproduce faster, The ocean becomes fresh water, According to the speech, why are oceans important for humans?, They only provide tourism, They produce more than half of the oxygen we breathe, They create plastic, They increase pollution.

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