What are the differences between begin and start?

[Helmey]

Hello everyone. How are you? I hope you’re fine and everything is OK.
I have a question about the differences between (Start & Begin). What are the differences between them? How could I choose the correct one if I have a multiple choice question like this one:

* I can't ....... to understand why anyone would want to be cruel to animals.
a)begin b) start.

Thanks in advance.

[Mister Micawber]

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This is being discussed here: Start and begin.
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Native English teacher at Mister Micawber's

[Helmey]

Thanks a lot Mister Micawber.I appreciate your help.

[Salima89]

hello
this is salima from karachi..i would like to know the difference between start and begin..both sound the same thats why its really confusing..well thank you so much for teaching english beautifully..

[Najwa]

Dear mr Torsten.
I got 7 on the test start or begin ,it is not easy to be sure about the answer.
Thank you for your care, and have agood time.
Najwa

[Hamed]

Hi dear Torsten
I read explain about different between begin and start. This explain is very good i don't understand some part and i used dictionary for find word but i have problem by some sentences please help nme for these:
I want to try out in order to test its validity.-You did give me a start.-The difference really lies-Moonless.
Actually i say that understand different between begin and start for me is difficult.
Excuse me because i didn't register on forum but after this i don't repeat.
Thanks a lot