Answer: I believe it’s A.
Explanation: it explains difficulties that astronauts may face and in the following sentence it goes more in depth
Answer:
on the contrary, -> to make a comparison.
As a result -> To suggest how one event relates to another.
Explanation:
hope this helps. . .
have a good day. UwU
"He knew that the coldest snaps never froze these
springs, and he knew likewise their danger. They were traps. They
hid pools of water under the snow that might be three inches deep, or
three feet. "
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These lines above would often give the reader the specialized leans and the knowledge about the scientific subject.
What information? It might help if there is information
