Question

if matthew wants to lose 20 lbs, what must he do?
seguir una dieta balanceada.
seguir una rutina.
seguir una dieta mal balanceada.

Explanation:

To lose weight, a balanced diet is crucial as it helps control calorie - intake while providing necessary nutrients. A routine is too general without specifying diet or exercise details. An unbalanced diet is not helpful for weight - loss.

Answer:

Seguir una dieta balanceada.