Janet wants to know if any form of life has ever existed on Mars.
How do the two sources differ on where evidence of life would be located on Mars?
1. Source 1 says that NASA has discovered life on Mars. Source 2 says Mars has had water in the past.
2. Source 1 says that moisture from clouds is a water source on Mars. Source 2 says that the water on Mars is in liquid form.
3. Source 1 says that evidence of life would be found below the surface. Source 2 says that radiation has destroyed any sign of life on
Mars.
4. Source 1 says that any evidence of water on Mars could be found on its surface. Source 2 says the evidence would be found below
the surface.

I would say the answer is definitely #3

Explanation:

The  question being asked is wether or not mars has ever held any alien life. Knowing that Mars holds water will help to answr if life could happen on Mars now, but not nessicarily if life lives or has lived on Mars. (knowing this will help you)

the speech this question is referring to is president kennedy's special message to the congress on urgent national needs, may 25, 1961

kennedy responds in a very direct and concrete way to those thinking that communism is a positive system:

"yet their aggression is more often concealed than open. they have fired no missiles; and their troops are seldom seen. they send arms, agitators, aid, technicians and propaganda to every troubled area. but where fighting is required, it is usually done by others--by guerrillas striking at night, by assassins striking alone--assassins who have taken the lives of four thousand civil officers in the last twelve months in vietnam alone--by subversives and saboteurs and insurrectionists, who in some cases control whole areas inside of independent nations." (kennedy)

president kennedy presents communism as cowardly, as a hidden and treacherous weapon that strikes from the shadows like thieves, he represents the system as not even being capable of showing and open and overt attack or confrontation. to finish up the response, he expresses that the system attacks even a country's idependence and freedom.

gerund phrase: giving more than a person needs.

noun use: predicate noun.