Select the most appropriate option to fill in blank no.4.
Show answer & explanation
Correct answer: B
Explanation
The correct answer is Option 2 i.e. gradually.
The given blank needs a word that would imply the slow increase in temperature.
From the options, the word gradually which means slowly over a period of time or a distance fits best in the given blank.
Hence, the correct answer is Option 2 i.e. gradually.