Difference between advice and suggestion?

[Juiceful1978]

English Error, Elementary Level

ESL/EFL Test #18 "Cat and mouse", question 8

He thought that one of them could give him some advise as to what was the best thing to do.

(a) give
(b) advise
(c) the best

English Error, Elementary Level

ESL/EFL Test #18 "Cat and mouse", answer 8

He thought that one of them could give him some advice as to what was the best thing to do.

Correct entry: advice
The error was: (b) advise

You have found the error but your entry is incorrect.
He thought that one of them could give him some suggestions as to what was the best thing to do.
_________________________

Please explain what's difference between advice and suggestion and how to use it?