Correct option is D
Mars is known as the Red Planet due to its reddish appearance, which is caused by iron oxide (rust) on its surface. This distinctive color makes Mars easily identifiable in the night sky.
Which one of the following is known as the Red Planet?
Mars is known as the Red Planet due to its reddish appearance, which is caused by iron oxide (rust) on its surface. This distinctive color makes Mars easily identifiable in the night sky.