Milton has been having considerable trouble with his short-term memory. his family has noticed a number of mistakes milton has been making (e. g., leaving doors unlocked, getting lost in the neighborhood, forgetting family members' names). it appears that the producing neurons are deteriorating.

a. gaba
b. ach
c. msg
d. serotonin

ACh

Explanation:

The Acetylcholine is an organic chemical that plays a major role in the brain and other parts of the body. It functions by transmitting messages from the brain to the various parts of the body.

It also helps in retaining memory as it enhances the alertness when we wake up. This hormone also helps in the sustaining attention and learning memory.

If the neurons stops producing acetylcholine then the brain does not retains information and is associated with memory loss.

Hence, the correct answer is Option B

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consumers: deer, mice, rabbits, chickens, squirrels, horses, worms, cows

predators: eagles, frogs, wolves, owls