The oceans affect the biosphere by i) producing a substantial amount of the biosphere's oxygen ii) adding carbon dioxide to the atmosphere iii) being the source of most of earth's rainfall iv) regulating the ph of freshwater biomes and terrestrial groundwater

iii) being the source of most of earth's rainfall

Explanation:

The oceans are most responsible for the formation of rain that occurs on our planet. This is because the water of the oceans in contact with the solar heat, evaporates, and becomes water vapor. This vapor is captured by clouds that become overloaded and start the precipitation process.

Precipitation is essential for human activities, such as agriculture, in addition to contributing to the smooth functioning of the hydrological cycle.

the national environmental policy act (nepa) is a united states environmental law that promotes the enhancement of the environment and established the president's council on environmental quality (ceq). the law was enacted on january 1, 1970. to date, more than 100 nations around the world have enacted national environmental policies modeled after nepa.

a. decomposes use carbon from dead organisms as fuel for cellular respiration, returning carbon dioxide back into the atmosphere.