Question

the root morph means shape. what does the word amorphous mean? having no clearly defined explanation having no clearly defined shape having no clearly defined center

Explanation:

The root "morph" means "shape". The prefix "a - " means "without" or "not". So "amorphous" combines "a - " (not) and "morph" (shape), meaning without a clearly defined shape. The first option is about explanation (not related to shape), the third is about center (not related to shape), so the second option matches.

Answer:

having no clearly defined shape