[必要「ひつよう」]はない => It is not necessary for A to be done
N2
Needs, Requirements
にひきかえ => In contrast to A
N1
Comparison/ Exchange
ようになる/なくなる => Become…
N3
Time, Situation
ぐらいのものだ => Only A
N1
(Not)only , (Not) even
くらいだ/ぐらいだ => Around/about
N5
Amount
ようにする => Try to A, make sure to A
N4
Causative, Passive, Volitional
[要「よう」]するに => A. In short/put simply, B
N2
Adjectival, Descriptions
を[余儀「よぎ」]なくされる => Must do A
N1
Will, Decision, Doing
ようとする => Be about to A, (about to) try to A
N4
Causative, Passive, Volitional
ようになる/なくなる => Come to A (transition over time), Come to be unable to A
N4
Time and Change
によって/により/による => By the means/method A, by A, In accordance with A, depending on A, based on A, due/because to A, For some A, certain A, According to A
N2