Answer the following question given this paragraph: 

In multicellular organisms, specialized cells may be organized into tissues. Tissues may be organized into organs, and organs may be organized into organ systems. Organ systems work together to carry out all the functions of the whole organism.


Q: In multicellular organisms, specialized cells may be organized into what, which in turn may be organized into organs?

 Choices:

- nutrients

- muscles

- blood cells

- tissues

A:
tissues
