Which characteristic distinguishes muscle cells from most other human body cells? Muscle cells are circular in shape.
Muscle cells are all the same size.
Muscle cells work only when needed.
Muscle cells have multiple nuclei.

1. protective factors are characteristics associated with a lower likelihood of negative outcomes or that reduce a risk factor's impact. individual-level protective factors might include positive self-image, self-control, or social competence

2. attitudes are the response that is a result of our values. values decide what we think as for right, wrong, good, or unjust. attitudes are our likes and dislike towards things, people, and objects. they represent several beliefs focused on a specific object or situation

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

since you have not provided the options here i   am going to give you general overview about hormone.hormone are actually the part of endocrine system in our body and produced by the endocrine glands. the hormones act like a chemical messenger   within human body. once produce by the glands they   travel through the blood stream and reach at specific or target tissue and organs   which result in control of our body function. the hormones are specific in their work and work on only the targeted tissue or organ   . with the of hormone endocrine system regulate the heart rate , metabolism, our mood and   growth as well as the development and even the sleeping cycle etc. they actually are the messenger for body cell and organs .