Which of the following is a renewable resource . air . petrol. coal. forest

Coal

Explanation:

All living plants store solar energy through a process known as photosynthesis. When plants die, this energy is usually released as the plants decay. Under conditions favourable to coal formation, the decaying process is interrupted, preventing the release of the stored solar energy. The energy is locked into the coal.

Petrol, air, and the forest are renewable

Renewable means they grow or come back faster than we use them. Coal takes millions of years to come back so it isn't a renewable resource.

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Explanation:

question

which are human systems?

the amazon rain forest

the appalachian trail

the george washington bridge

the himalayas

the hoover dam

the north american free trade agreement