I believe the best answer is A.
People are more afraid in fossil fuels running out rather than the other reasons that don't really affect the people today. Hope it helped!!!
Answer:
An annemometer is an instrument for measuring the speed of the wind, or of any current of gas.
Explanation:
The medulla oblagonta. Its main function is to send signals to the muscles that control respiration to cause breathing to occur.
The back portion of the brainstem is called the Cerebellum. Cerebellum is responsible for motor control. It involves in our cognitive function in attention and language, and regulating fear and pleasure responses.
The bark of a tree is impervious to gases and water because bark cells are dead cells of the epidermis and compactly arranged without intercellular spaces. They contain a chemical called suberin in their walls that make them impervious to gases and water and it doesn't allow gases or water into the tree as bark cells are in the bark outer most layer of the tree.