The farmer is ___ cutting the crop which had been ripened.

Explanation: • The sentence refers to an action happening right now, so the correct tense is Present Continuous.

• Present Continuous is formed with “is/are + verb-ing.”

• “Is cutting” shows the farmer is performing the action at the present moment.

• “Was cutting” would indicate past action, which is not suitable here.

• Therefore, the correct answer is “is.”