Final answer:
The sentence error in question is the verb agreement, and the correct form of the sentence is provided.
Step-by-step explanation:
The subject of this question is English since it involves identifying a sentence error and providing the correct form.
The error in the sentence is the verb agreement. The subject 'The will to make healthy choices' is singular, so it should be followed by the singular verb 'is' instead of 'are'. The correct form of the sentence is: '
The will to make healthy choices
is
a must for any exercise plan. Put that pizza down and pick up some delicious #kale today!
'