Can someone please write an introduction about depression

Explanation:

When your writing about depression, don't be afraid to state the obvious. Remember to write like your informing your audience, also remember to include your own definition of depression. Depending if your a middle schooler or a high schooler, you can go into detail about depression and how you feel about it. You can talk about the effect depression has on a person and the human brain.

Example:

depression is a common thing that we now find, everywhere. depression can follow a person, it can affect a person's mood.

not quite sure but i think its

what are the choices?