Which items exist on earth because of green plants ?

From the following items:

1. An atmosphere containing oxygen

2. wooden furniture

3.food, including vegetables, fruits, and meats

4.fibers to make cloth

5. drugs such as aspirin

6. fossil fuels such as oil, gas, coal and nutrient-rich soil

ALL of these things are one way or another, exist because of green plans. E.g. Oxygen is released by plans, while wood for furniture comes from trees.

All fruits and vegetables are grown on plans while even meat comes from animals who eat green plans.

Fibres such as wool also come from animals which eat plans, and fossil fuel is made from the remains from millions of years of old plans in the ground.

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looks like the answer is     c     to me!

the answer is 100% density i've answered this question before and done the quiz myself.