The planned and sustained effort to establish and maintaingoodwill and mutual understanding between an organization and itspublics is known

Public Relations

Explanation:

assuming you are in the home page.

1) go to the upper right hand corner

2) click on your "profile picture"

3) go down to "edit profile"

4) it should be titled as "edit your profile", click on "profile picture"

5) choose a file

6) press "change"

you're profile picture is updated

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answertrue;