Why is it important for humans to have a variety of specialized cells

It  important for humans to have a variety of specialized cells as specialized cells allow different types of tissues to exist in organs which in turn allow various organs to perform different functions in the human body.

Explanation:

It is important for humans to have a variety of specialized cells as specialized cells allow different types of tissues to exist in organs which in turn allow various organs to perform different functions in the human body.

The organ is similar to a factory where every type of cell performs different functions.

The process of Cell specialization is also known as cell differentiation.

any abiotic or biotic factor in an ecosystem that causes a population's size to slow or decrease is a limiting factor.

b. lithosphere, asthenosphere, mesosphere   is the answer most likely