Answer is A.
Cell have to spilt themselfs apart to make more cells for the system. Tree are like cells because they sometimes have seeds in them that help generations of trees grow!
Some possible scenarios include worldwide temperature change, worldwide disease breakout, environmental change, and lack of resources.
When the concentration gradient of such molecules is high on the either the cytoplasmic side or the extracellular side of the cell. When the concentration gradient is high it flows freely through the cell membrane to the other side without expanding energy.
Hope i helped!
B. and I get you the one who made up this question is dump -_-
