What is the purpose of using 'to' in the sentence 'We made a list of things to do'? 1. To indicate the purpose of something. 2. To indicate the re...

What is the purpose of using 'to' in the sentence 'We made a list of things to do'?

1. To indicate the purpose of something.
2. To indicate the reason why somebody does something.
3. To indicate the general purpose of something.
4. To indicate the negative purpose of something.
5. To indicate the possibility of something.