The letter A is the one that represents a neurotransmitter acting via direct effects.
<h3>What is a neurotransmitter?</h3>
These are chemical messenger that helps carries signals across the neurons and target cells throughout the body.
Hence, the letter A represents a neurotransmitter acting via direct effects because its involves direct connection between the neurons.
Therefore, the Option A is correct.
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<em>brainly.com/question/26387085</em>
I believe the answer is: 1%.
Internet use disorder refers to a form of psychological disorder that characterized by addictive behavior for using internet.
Even though the name sound less serious, it could most likely damage the victim's ability to form a real human connection with other people that would negatively affect their future.