In any population there will be variations of certain characteristics. For example, in the giraffe population there is a variation in the neck lengths among individuals. Some have longer necks and some have shorter necks. Giraffes with a longer neck variations would be more likely to survive than shorter-necked giraffes in which of these situations?

Monkeys swarm in and tear off all of the lower leaves to use for shelters

Explanation:

Question is incomplete:

A) loggers come in and chop down all of the trees

B) insects can only eat the highest leaves due to the canopy

C) a plant disease infects the trees, resulting in total leaf death.

D) monkeys swarm in and tear off all of the lower leaves to use for shelters

Giraffes are the tallest animals found on Earth. They live in open forest, savannahs and grasslands where they feed from the leaves of trees. Because of their height, they can reach places that are inaccesible for many other herbivores.

If a mutation or variation occurs in the population, which causes some giraffes to have higher necks, they will have a better chance of surviving since they can reach tree leaves at higher altitudes. While giraffes with shorter necks do not have as much of a feeding advantage, they can only reach leaves at lower altitudes, thus limiting the availability of food.

But referring particularly to the different situations:

A) If loggers chops all of the trees, then the entire population would die. It does not matter if they have a long or short neck, there will be no trees to feed on.

B) If the insects eat the highest leaves, then both short and long neck giraffes would be able to feed with the lowest leaves of the trees.

C) If all the leaves are lost, then both short and long neck giraffes would die because none will find food.

D) If monkeys tear off all of the lower leaves, then only leaves will be available at the top of the trees, which can only be reached by giraffes with long necks. Those with short necks will not have food. In this situation, giraffes with a longer neck variation would be more likely to survive than shorter-necked giraffes.