In the following passage some words have been deleted. Fill in the blanks with the help of the alternatives given. Select the most appropriate option for each blank

Comprehension:

Environmental pollution is a global problem and (1)______ threat to human survival. The causes of pollution are quite (2)______, such as contamination of water, cutting of trees and forests, emission of toxic gases etc. Due to (3)______ factors, the flora and fauna are adversely affected. An awareness to protect the environment is everybody’s (4)______ duty and we should collectively come forward for this noble campaign. Government is taking strong (5)______ to check the menace of pollution.