が必要 => need; necessary N4
…のも無理 (は) ない => It's natural for... N3
Evaluate
必要がある => Need/Need to N4
のも無理もない => (to be) natural,(to be) understandable N3
Evaluate
[要「よう」]するに => A. In short/put simply, B N2
Adjectival, Descriptions
要するに => in short; in a word; to sum up; to put it simply ~ N2
[必要「ひつよう」]はない => It is not necessary for A to be done N2
Needs, Requirements