you forgot to include the answer D and c but I think it might be A
Simile, it compares two unlike things using like or as
Answer:
Unimportant to a given topic.
Explanation:
According to the chart the prefix irr means not. Hence the "not" important ( relevant, the base of the word means important to a given topic)
Magnifying glass and a petri dish
Answer:
Comma splice
Explanation:
Comma splices are two complete sentences that are joined with only a comma.