Answer:
Physical systems and Environment and society
Explanation:
They lacked immunity to these diseases.
before the europeans, the american indians hadn’t come in contact with these diseases that were part of a different area of the world. as a result, many american indians died.
Answer:
Option (B)
Explanation:
From the given sentence, the use of the parallelism in the wording has to be taken in consideration. So, as -are so is used in the word -cold, likewise, the word -is so will also be used right before reflective. Then again, as the sentence continues, the phrase "-were it to do so" will provide the consequence of the melting of the ice, which is the first component of the sentence.
Thus, the correct answer is option (B).
