The right option is a. variations.
Variations are the differences between the individual organisms of the same species which is as a result of genetic differences or the influence of environmental factors on the expression of the genetic abilities. Variation may be expressed in behavior, physical appearance, learning, and metabolism. The two types of variations are somatic variation and germinal variation.
Answer:
through a process called cellular respiration
It takes 8 electrons to fill a shell.
Venus is often called the sister planet of Earth because of its size, mass, and what its material its made of.
