Difference between topic sentence and supporting sentence

[Hadeel08]

Hello.

Can anyone please explain to me the difference between topic sentence and supporting sentence with examples please. :(

...Thanks a lot.

[Mister Micawber]

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Welcome to English-test.net, Hadeel.

The supporting sentence adds detail, proof, example or explanation to the topic sentence.

Topic sentence: Dogs make better pets than cats.
Supporting sentences: Dogs are more willing to share in their owners' activities, because they are a species that normally lives in social groups. Also, because they are territorial, dogs can be trained to guard their owners' property and possessions.
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Native English teacher at Mister Micawber's

[Hadeel08]

Thank you Mister Micawber, I really needed this :)