What is an incentive?
a; a way to minimize the use of resources on a particular want
b; a gesture or a reward to increase productivity or motivation
c; a punishment or penalty for overusing or misusing a resource
d; a freely available resource that fulfills an unlimited want

An incentive is a gesture or a reward to increase productivity or motivation.

Option B is correct.

Incentive can be defined as a motivator used in order to encourages someone to do something. Traditional incentives are extrinsic motivators which reward actions to yield a desired outcome. The effectiveness of traditional incentives has changed due to the fact that the needs of Western society have evolved. For instance, a monetary bonus can be considered an incentive.

the percentage of students at the school need special diets is

c) 10 percent

answer: my personal opinion is the black spider because he is more powerful than spiderman.