What happens when an overgrowth of algae dies?

Mineral rich water heated by newly found oceanic crust escapes through cracks in the ocean floor called

Which of these statements is true about autotrophs, but not heterotrophs? a. they use sugar and oxygen to make carbon dioxide and water.b. they use chlorophyll and oxygen to make carbon dioxide and water.c. they use sunlight, water, and carbon dioxide to make sugars.d. they use sunlight, water, and oxygen to make chlorophyll.

Which describes the habitat of a frog?