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 X is
.

Answer 1

a planet the is human habitable or just plain out earth

Step-by-step explanation:

Answer 2

I believe Planet X is Earth

Step-by-step explanation:

I believe Planet is Earth because we do not need Space suits to breath on this planet and we can walk perfectly fine without floating away.