Question

the terrestrial planets are all made of what? * image of mercury, venus, earth, moon, mars with their internal structures (crust, mantle, core) labeled options: gasses, water, oxygen, rocks (rocks is selected)

Explanation:

Terrestrial planets (Mercury, Venus, Earth, Mars) have a solid structure with crust, mantle, and core, composed mainly of rocky materials. Gases are for gas giants, water/oxygen don't define their primary composition. So "rocks" is correct.

Answer:

D. rocks (assuming the options are labeled A - D as A. gasses, B. water, C. oxygen, D. rocks)