A( is a reward or punishment that encourages people to behave in certain ways.

I believe the answer is: Incentive

Incentive could be given in the form of financial incentive or behavioural incentive (special treatment). For example, let's say that a company provide an additional $20 per hour for those who are willing to spend their time working after 5 pm. In this situation, the additional $20 per hours is considered to be an incentive.

modal adverbs are used to modify specific verbs that consist of a linking verb (verb of being) and sometimes another verb. examples of modal verbs include can, could, may, might, must, shall, should, will and would.

modal auxiliary. an auxiliary verb characteristically used with other verbs to express mood, aspect, or tense. in english, the most common modal auxiliaries are can, could, may, might, must, ought, shall, should, will, and would. also called modal .

c -invasion by the moroccans.