What are the most basic building blocks of all organisms?

A.

organs

B.

blood

C.

cells

D.

tissue

The answer for your question will be C. Cells

Cells

Explanation:

Non-living, it's atoms, but the smallest unit component that all living beings must have is the cell. In fact some living things can be just one cell. Every living being comes from cells, is made up of one or more cells, and cannot be considered a living organism without at least one.