"Research suggests that Mars has some features that would support life, but most conditions are too harsh for it." is <span>definitely</span> a main idea as for the second one your best bet is to talk about possible life on mars in the future so that 4th sentence is going to be your friend.
Lol, i'm doing the same question for a benchmark.
Philip is a naughty boy and should be ground for watching "things" all night
For the answer to the question above asking when should agreements be developed? The answer is <span>b. before an incident occurs.
I hope my answer helped you with your problem.Feel free to ask more questions. Have a nice day!</span>