Question

why are cells called the building blocks of an organism?
o they are visible to the naked eye.
o they are made from nonliving materials.
o they are the basic unit of life.
o they are able to generate new cells.

Explanation:

Cells are the fundamental structural and functional units of all living organisms, which is why they are called building - blocks. Most cells are not visible to the naked eye, they are living entities, and while cell - division can generate new cells, the key reason for the 'building - block' term is their status as the basic unit of life.

Answer:

C. They are the basic unit of life.