In the following question, out of the four alternatives, select the alternative which will improve the bracketed part of the sentence. In case no improvement is needed, select “no improvement”. As he tried harder, his steps slowed, his senses (was activated).

Explanation

The given sentence is :As he tried harder, his steps slowed, his senses (was activated). In the later part of the given sentence, the subject is ‘his senses’ which is in the plural form, and the entire construction is made using the past tense. But the tense is past and the subject ‘senses’ is in the plural form, therefore ‘was’ is a wrong choice of be verb and it must be ‘were activated’.