The answer here is D, and it's kind of obvious. But you probably already knew the answer and are just doing this for piece of mind.
Explanation: Just the fact that we don't know whether or not there even is extraterrestrial life rules out every other answer, without even needing to go in depth.
(Okay, I read your question completely wrong, it's asking for which one of these has been solved isn't it?)
This is tough because all of these other than D have been figured out. Go with the methane atmosphere then.
I believe that substance would be water.
A. Climate, because the climate is the weather conditions in an area for a long period of time, so she would be able to pack clothing that wouldnt hinder her in that specific climate
Answer:
More individuals are produced each generation that can survive. Phenotypic variation exists among individuals and the variation is heritable. Those individuals with heritable traits better suited to the environment will survive.
I might go in there on mondays and fridays
because the flowering plant is very important
if you don't make it
you may damage them
good lucks :)
