Answer:
Positive or negative environmental stimuli.
Step-by-step explanation:
Incentives are those drives that are positive or negative stimuli to motivate us in our performance. These stimuli are a means to motivate us and are either helpful or repelling for us.
Incentives are the motivational attempts of human behavioral aspects which is to drive us to act in a certain way. These behavioral environmental stimuli can be in any form, be it monetary, or physical influence or any material influence.
Thus, the correct answer is the fourth option.