(A) Culminating
(B) Climatic
(C) Temperate
(D) Atmospheric
Ans: (A) Culminating
Explanation:
Synonym of Climactic-
apocalyptic
apocalyptical
highest
pivotal
critical
climacteric
decisive
culminating
crucial
watershed
high
cataclysmic
life-or-death
fateful
crowning
epochal
life-and-death
momentous
apical
meridian
crestal
earthshaking
crossover
payoff
vital
make-or-break
apogean
deciding
cataclysmal
go-no-go
Reference Link: https://www.merriam-webster.com/thesaurus/climactic