freshwater - agua dulce, saltwater - agua salada, ecosystem - ecosistema, aquatic - acuático, sunlight - luz solar, coast - costa, open sea - mar abierto, algae - algas, basalt - basalto, conglomerate - conglomerado, limestone - caliza, rainforest - selva, coral reef - arrecife de coral, extinction - extinción, destruction - destrucción, pollution - contaminación, hunting - caza, overfishing - sobrepesca, species - especies, soil - suelo,

(Grade 4) UNIT 6: ECOSYSTEM

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