Select the most appropriate option to fill in blank number 3.
Show answer & explanation
Correct answer: A
Explanation
The correct answer is option 1 i.e. causes.
The sentence says: “Strong evaporation (3) ______ tree leaves to fall off and bushes and grass to wither during the dry season.”
Causes fits perfectly because evaporation is the reason something happens — it causes the leaves to fall and plants to wither.
Option 2 (reason): Grammatically incorrect here, as the sentence requires a verb, not a noun.
Option 3 (source): Refers to origin, not an action.
Option 4 (root): Means origin or base, but again, it’s a noun, not a verb.