They would know if they see anything like traces of water or anything else that would be nessecary for a living organism to have. They look for these with technology like the hubble telescope as well as the drone on Mars to gather as much information as possible.
He will use any form of length measurement to measure the length, width, and height of the pool, use the formula V=lwh to find the volume.
Purple flowers is the correct answer because If there was a cross between both it would most likely be purple
Answer: the answer is A
Explanation: i just did it
