Question

it is crucial to study ocean microbes because __________. a. they control the major biogeochemical cycles that keep earths biosphere in balance b. they are a significant source of greenhouse gases and pollution c. they are frequently used as food sources in developing nations d. they provide a significant alternative energy source used to replace coal and oil please select the best answer from the choices provided

Explanation:

Ocean microbes play a key - role in biogeochemical cycles like the carbon cycle, nitrogen cycle etc., which are essential for maintaining Earth's biosphere balance. They are not a major source of greenhouse gases and pollution (option b is incorrect), not frequently used as food sources in developing nations (option c is incorrect), and not a significant alternative energy source to replace coal and oil (option d is incorrect).

Answer:

A. they control the major biogeochemical cycles that keep Earth's biosphere in balance