thatの用法の違いについて

教えてください。よろしくお願いいたします。

①~④のthatの用法の違いを教えてください。

The team found ①that during the arm-cocking phase,a thrower's humerus rotated almost 60°
beyond the limit ②that he could reach using his own muscle power; a sign ③that ligaments and tendons were stretching and storing energy.
Also human's long, flexible waist relative to ④that of chimps,enables greater rotation of the torso ,which in turn allows more energy to stored before a projectile is loosed.

No.1 ベストアンサー 回答者： ありものがたり 回答日時： 2020/02/16 03:48

① 名詞節を作る接続詞

② 目的格の関係代名詞
③ 名詞節を作る接続詞(同格のthat)
④ 代名詞