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.
Environmental pollution is a global problem and (161) ______ threat to human survival. The causes of pollution are quite (162) _______, such as contamination of water, cutting of trees and forests, emission of toxic gases etc. Due to (163) _______ factors, the flora and fauna are adversely affected. An awareness to protect the environment is everybody's (164) ______ duty and we should collectively come forward for this noble campaign. Government is taking strong (165) _____ to check the menace of menace.
Select the most appropriate option for blank No.163

Options

A. those
B. this
C. these
D. that

Answer

C

Explanation

(c) these
Here all the given options are demonstrative pronouns. These and this are used to refer to nearby things or objects and also many factors are talked about .So the correct answer will be “these”.