Alocal karate studio offers many services: karate lessons to young children (under age 10), judo lessons to preteens, kickboxing courses for teenagers and adults, and self-defense courses for older people. we can say that the studio has achieved because the studio's activities interact and reinforce one another.

The correct answer is fit. It is because the studio were able to pair with the activities in which it enables people to interact and to be reinforce in one another in which fit is being defined as something which is considered to be fitting or something to be more suited and appropriate.

they can increase to boost the enonomy.