Jeremy has parkinson’s disease, a progressive neurodegenerative disease that affects motor skills. in addition to motor symptoms, jeremy has noticed changes in his mood, and he feels the need to smoke more cigarettes than he used to. it is likely that jeremy’s is producing less than it needs to.

It is likely that Jeremy’s basal nuclei is producing less dopamine than it needs to.

Explanation:

Parkinson's disease is caused by less production of neurotransmitter dopamine from basal nuclei present in the cerebrum of the brain. Lower levels of dopamine have caused Jeremy's mental health. He needs to smoke more than earlier to fight depression caused by lower dopamine levels.  

Dopamine imbalance would also affect his balance and coordination of muscles. He would not be able to perform the routine tasks by himself.  

you didn't give any options but heres what i can tell you: an inference is likely to change based on additional observations. the latter is something that you have seen or sensed using your sensory organs while the former is like a conclusion out from what you have observed.

multiply it by 5 in order for you to understand i cant give an exact answer.