The answer will probably be b
Answer:
<em><u>The diaphragm muscle contacts and relaxes to force the intake and expulsion of air from the lungs.</u></em>
Explanation:
The diaphragm is a large, dome-shaped skeletal muscle. It is very thin, and is located at the base of the chest just above the abdomen.
It plays a very important role during respiration or breathing by forcing the intake and expulsion of air from the lungs.
During inhalation, this muscle contracts, and flattens- in the process, a vacuum is created, effectively pulling air into the space. In exhalation the muscle relaxes, and is no longer flattened, this reduces the volume of the region, forcing air out of the lungs.
These contractions occur rhythmically and continuously.
Answer:
C: Fire
Explanation:
Natural and anthropogenic (caused by human) fires could lead to destruction of existing climax community. This leaves the habitat open for the secondary succession where a pioneer species can enter. Lava flow and wind are the natural cause of succession while over-cutting of trees is its human cause.
Oxygen Usage should be the answer
Answer:
B. Cheetahs
Explanation:
Grass obviously does not hunt, nor do zebras. lappet faced vultures are scavengers, so the cheetah fits all of the above.