Are these Collocations?

Hi folks, could you tell me if the BOLDED phrases are collocations or not? If relevant, I'd love a comment on each o the sentences below (on whether or not it's a collocation).

I know that collocations are when words are often seen together. But I get confused when I see words with prepositions, phrasal verbs or certain grammatical structures/phrases.

1) Livestock accounts for the majority of global warming.

2) I went up to the cashier.

3) I walked out of my house.

4) I saw through the keyhole.

5) I opened up the package.

6) I spoke with my friend.

7) I sat on the table.

8) He ate the greatest amount of food.

9) I went through a series of 3 stages for my interview.

10) I continue to walk.

11) He develops into a full-sized adult.

12) It passes through a machine.

13) The vast majority of residents are over 60 years of age.

14) It used to be here.

15) It changed at a later period.

16) He ate a total of 2 slices.

17) The damage was caused by an earthquake.

Could you please tell me what would be considered AN ACTUAL COLLOCATION? Thank you!