어서 가져오다

bring it — because, or after doing something

-아/어서 does two jobs here. In five of these lines it means 'because', which is the standard way to hand something over and explain why: 형이 그 말할 것 같아서 가져왔어요 'I brought it because I figured you'd say that', 술 좋아하신다고 해서 가져왔어요 'I heard you like this, so I brought some'. In the rest it simply sequences the actions: 나눠서 가져오다 'split it up and take it home', 삶아서 가져오다 'boil it first, then bring it'.

Register: polite conversational