Let's look at an example.
Here's our first topic sentences again, and here are three
ideas that the writer has that will support that topic sentence.
The thing that we're trying to support is that,
speaking another language broadens a person's view of the world.
They become aware of different cultures.
They think about subjects they've never thought about.
They learn about different countries.
Those are three things that support the topic sentence that says,
speaking another language broadens a person's view of the world.
And then we need details for each of those supports.
So, this is the first support, they've become aware of different cultures.
The writer gives a detail that many people never leave their hometowns.
That helps to explain why they become familiar with different cultures
when they learn a second language.
And then there's another detail about not even having friends from other cultures.
So again, that's a detail explaining why learning a language
would help people to become aware of different cultures.
Here's the second supporting idea,
they think about subjects they've never thought about before.
And here the writer gives a detail, new vocabulary gives insight into
the country that speaks that language that helps to explain that supporting idea.
And then the writer gives an example.
A language spoken only in hot climates may not even have a word for snow.
So that's a very specific example that shows
something new that a person would think about if they learned another language.