Question

1. which of the following inner planets is often called the red planet?

○ earth
○ mercury
○ mars
○ venus

Explanation:

The inner planets are Mercury, Venus, Earth, and Mars. Mars is often called the "Red Planet" because of the iron oxide (rust) on its surface that gives it a reddish appearance. Earth is our home planet, Mercury is the closest to the Sun, and Venus is known as the "Morning Star" or "Evening Star" and has a thick atmosphere. So the correct option is Mars.

Answer:

C. Mars (Note: Assuming the options are labeled as A. Earth, B. Mercury, C. Mars, D. Venus. If the original labeling is different, adjust the identifier accordingly, but the correct option text is Mars.)