Select the most appropriate option that can substitute the underline word in the given sentence. If there is no need to substitute it, select ‘No substitution’. Sea levels have been risen all around the world threatening natural calamities like tsunamis, floods, etc.

Correct answer: have been rising

Explanation: The correct answer is C.✅ The phrase "have been risen" is grammatically incorrect because "rise" is an intransitive verb and cannot take a passive form like "been risen". The correct form is: "Sea levels have been rising all around the world threatening natural calamities like tsunamis, floods, etc. ✅"Rise" is used in the present perfect continuous tense here to show an action that started in the past and is continuing into the present. ❌"Will rising" is grammatically incorrect. ❌"Are raised" is passive and suitable only for transitive verbs (like "raise", not "rise"). ❌"No substitution" is incorrect because the original phrase is ungrammatical.