Complete the botanist's care guide for the rare 'Drama Queen' Venus flytrap.

As a general rule, if you play classical music for this plant, it ___ its traps and sways to the rhythm.

The correct answer is opens.

The phrase "As a general rule" tells us this is a Zero Conditional sentence, which is used to describe habits, routines, or scientific facts. In the Zero Conditional, we use the present simple tense in both the "if" clause ("play") and the main clause ("opens").