Let's look at the sentence: "mounted police patrol parks and narrow streets, where cars can’t go."
Here are some things to notice:
- "mounted police" – this is correct; it means police officers who ride horses.
- "patrol parks and narrow streets" – this part is also good; "patrol" means to walk or ride around an area to keep it safe.
- "where cars can’t go" – this explains why horses are used; cars cannot always enter these places.
However, the sentence needs a capital letter at the start because all sentences begin with a capital letter. So, it should be:
Mounted police patrol parks and narrow streets, where cars can’t go.
That's the only small change needed! The grammar and meaning are correct, just remember to start with a capital letter.