Vincent enjoys playing the guitar and practices for hours at a time. practicing is a very pleasurable activity for him, and he does not do so for any kind of tangible reward. vincent is motivated to play the guitar.

Intrinsically motivated

Explanation:

Intrinsic motivation is the behavior that is being rewarded by internal motivation. The behavior could be engaged in the action that is motivated internally. This behavior will naturally satisfy a person because it occurs from an inner motivation.

Extrinsic motivation is the opposite of intrinsic motivation. This motivation engaged in behavior that is the result of the outer factor. Intrinsic motivation occurs when a person is not engaged in a behavior that is rewarded by the external behavior.  

Thus here in the above statement, Vincent loves to play the guitar and enjoy singing because of his internal motivational behavior.

the answer would be c. sediment buildup on continental slope

                                                                                -hope this -

chronological thinking is an indispensable tool to structure a historical narrative and to give meaning to a sequence of events. the final section presents the results of a survey to test the chronological thinking of lower secondary school students carried out by the educational research institute.