Question

Planet X is a terrestrial planet in our solar system. It has 21% oxygen in its atmosphere. Humans can walk on this planet without the aid of a space suit.

Based on the description, planet A is ___


earth
mars
mercury
venus

Answer 1

Earth

Step-by-step explanation:

I tried earth and got it right

Answer 2

Based on the given description above, the planet that is being described would be planet EARTH. It is the only planet where humans can walk without the aid of a space suit, and the only planet that can provide humans the necessary oxygen to survive. Hope this answers that question.