What would most likely happen to the carbon cycle if there were no more plants on earth?

a) animals would consume more carbon.
b) more carbon would be released from fossil fuels.
c) carbon would build up in the atmosphere.
d) animals would perform more photosynthesis.

The best answer is C.

What may happen as plants gradually die out would be an imbalance of the atmospheric air with oxygen getting depleted and carbon dioxide levels gradually increasing. Plants are the only living things that consume the carbon dioxide that we breathe out and in turn give out oxygen that we breath in on for life.

In reality, plants are such  a vital and integral part of the ecosystem that without them  life on earth would not even be possible. Plants are the backbone of all life. They make oxygen, are the source of all food directly or indirectly, and they regulate the water cycle by  helping  to distribute and purify the planet's water.

heat a spark and oxygen

the answer is; comparing the frequency of collisions with and without the device

this makes the anti-collision system an independent variable and the collisions a dependent variable. if there are fewer collisions with an anti-collision system that without, then it can be stated that the system is a success. essentially, collisions under an anti-collision system are compared with the frequency of collisions by cars with the human drivers.