The context of the following conversation is Riley didn't put in a lot of effort and because of that they would often fail.:
Riley says I have to find out why I'm not motivated in this team work..
The friend responds That's so unlike you. Why don't you think you're motivated?.
Riley responds I don't know but this lack of effort is causing my group to fail. We've failed the first part of the assignment that we submitted..
The friend responds Is it just you lacking in effort?.
Riley responds Yeah. I think everybody else is pulling their weight..
The friend responds Well do they care? Because somebody could pick up the effort you lack..