Which describes the characteristics of a mental disorder? an illness that affects the mind and a person’s ability to function, to adjust to change, or to get along with others

an illness that affects the body’s ability to absorb nutrients

an illness that affects the brain, heart, and blood vessels

an illness that affects the body and reduces a person’s ability to digest food

The first, An illness that affects the mind and a person's ability to function, to adjust to change, or get along with others.

Explanation:

The second one is related nutrient deficiency, the third one is related to health disorders, and the final one is related to intestinal disorders.  

for me i have felt invisible when i was clearly struggling,or,i made a great achievement ,and,nobody took to notice me either because they just didn't see it,or,people just turned their back on me.i can see a person being invisible by choice,or,without choice like i did.the people who are invisible by choice don't try to talk to people,don't try to make friends,and,keep to themselves.i haven't been one of those people so i couldn't give you a reason.

hope this and can i get bainliest my dude : d