Diving, sport of plunging into water, usually head foremost, performed with the addition of gymnastic and acrobatic stunts. In its more elaborate, acrobatic form, diving originated in Europe early in the 19th century as a diversion of gymnasts and as a competitive sport in the late 19th century. It became a part of the swimming program of the Olympic Games in 1904 and developed rapidly through the first half of the 20th century. Synchronized diving, a competition in which two divers simultaneously perform a dive, emerged and became part of the Olympic program in 2000.

High diving is the act of diving into water from relatively great heights. High diving can be performed as an adventure sport (as with cliff diving), as a performance stunt (as with many records attempts), or competitively during sporting events.
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Further Resources
12 Facts You Didn't Know About Red Bull Cliff Diving
Web
August 9, 2019
How Hard Is A Dive From Up To 27 Meters After A 21 Month Break?
Web
June 19, 2021
Learn the Fundamentals of a Back Jump! - Swimming 2016 #11
Web
March 1, 2016