The answer to your question is fish
The right answer is glutamate
Glutamate is a major excitatory neurotransmitter associated with learning and memory.
It is also associated with Alzheimer's disease whose first symptoms are felt in memory.
Most people unknowingly consume monosodium glutamate (MSG), a commonly used food additive.
An experiment was done on healthy patients, giving them 12 grams of glutamate. It was found that the experience led to headaches, nausea or jaw pain in 50-60% of cases.
It was also measured the level of glutamate contained in the muscles of patients with jaw problems. The tests concluded that the most painful muscles were those containing the highest levels of glutamate.
According to him, one of the keys to chronic pain could lie in the development of drugs that reduce the rate of glutamate.
A: an ecosystems organisms become larger as succession
I'm assuming that the choices are the ways urban landfills use to increase decay rate for most trash? If so, then the answer would be '<span>increase the number of aerobic bacteria'. Increasing the number of aerobic bacteria increase the decay rate for most trash.</span>
D. Mutations will always impact an individual on some level
Most of these seem accurate or at least close to being accurate on how mutations affect genes however, some mutations won’t always impact an individual because some mutations are so minor. But this is my best guess