Question

Need help please!

Mars was once similar to Earth in that

A. it had only one moon.
B. liquid water flowed on its surface.
C. it showed evidence of plate tectonics.
D. its atmosphere had a thin layer of carbon dioxide.

Answer 1

B. Liquid water flowed on its surface.

Step-by-step explanation:

We see evidence nowadays that Mars once had flowing water on its outer crust/surface. But due to temperature and different climate changes, the water changed into ice, and some of this water evaporated to space. Hope this helps!

Answer 2

B. Liquid water flowed on its surface