Select the most appropriate option to fill in blank no. 5.
Show answer & explanation
Correct answer: D
Explanation
The correct answer is option 4 i.e. gradual.
Context: The sentence talks about soil formation and mentions that forming even a thin layer takes over 1000 years. This implies a slow and steady process, so we need a word that conveys slowness.
Meaning of the words:
Abrupt: Sudden and unexpected.
Chemical: Related to substances and reactions.
Steep: Having a sharp incline.
Gradual: Happening slowly over time.
Correct word: Gradual
Reason: Among all the options, only “gradual” fits both the idea of a long duration and the process of formation. The other words either don't fit grammatically or are unrelated in meaning.
Final Sentence: Soil formation is a gradual process in general.
Hence, the chosen option will be correct.