How can I unblock Brainly?

First read the text below on that screen :
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Why this blocking? Something about the behaviour of the browser has caught our attention.
There are various possible explanations for this :
- you are browsing and clicking at a speed mush faster.
- something is preventing Javascript from working on your computer.
- there is robot on the same network as you.
Having problems accessing the site? Contact support
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After reading that, I think it seems like you have to click on Contact Support to find out about unblocking your account. Or you can also contact the moderator / administrator.
Hope it helps and is useful :)