Increased temperatures, sea-level rise, unpredictable and disastrous weather _____(i)_____ are all fallouts of an _____(ii)_____ climate crisis.

(e) is the right answer. The sentence seeks to convey that increased temperature, sea-level rise, unpredictable nature of weather has been caused by climate change. For the first blank, we need a noun to be modified by the adjective DISASTROUS. EVENTS (a thing that happens or takes place, especially one of importance) and OCCURRENCES (an incident or event) fit contextually. OCCASIONS (a particular event, or the time at which it takes place) does not fit contextually. UNPRECEDENTED (never done or known before)and UNMITIGATED (absolute; unqualified) fits contextually. Unilateral((of an action or decision) performed by or affecting only one person, group, or country involved in a situation, without the agreement of another or the others) does not fit contextually.