What does evolution mean in biology?A) change in species over time B) change in individuals over time C) change in theories over time D) change...

If you are referring to organic evolution, then the
correct answer would be choice a. Evolution is change in species over time. Since the
environment is constantly changing, environmental pressures are placed on living species
in terms of being able to adapt to their surroundings, find food, escape predation, etc.
Those variations within a population, which are actually genetic mutations, may allow an
individual to have an advantage. If that is the case, it will be selected for. If the
individual passes along these variations, over time, more members of the species will
also have these variations. Eventually, a new species may arise. This change in species
over time is evolution.