By buying something, we can own that product. So we don't have to concern about the price anymore. In contrast, if we rent something, we need to take care about the fee on every due dates. And we can use that product as we want. We can lend it to others and we can modify the product too.

Hello, Seong Eun!

Thanks for writing your homework! ^^
See you tomorrow~

-T.Jhozel 

By buying something, we can own that product. 

>> Correct!

OR: By purchasing something, we gain ownership of it. 

So we don't have to concern about the price anymore. 

>> Correct!

OR: So we no longer have to be concerned about the price. 

In contrast, if we rent something, we need to take care about the fee on every due dates. 

>> Correct!

OR: In contrast, when we rent something, we must pay the fee on each due date. 

And we can use that product as we want. We can lend it to others and we can modify the product too.

>> Correct!

OR: And we can use it however we want. We can lend it to others and customize the product.