The correct answer is 1. Curtis is not being generous with their time and effort.
Step-by-step explanation:
In a healthy relationship that includes the relationship between mates, friends, relatives, etc. one of the most important aspects is to spend time with the other. This guarantees people can know each other and therefore can work better. In the case presented, Frankie is communicating with Curtis to try to spend time with him at the park. However, Curtis always says he is busy and therefore he shows he is not making an effort to spend time with Frankie, which would affect negatively their relationship and the way they work in the team. According to this, the behavior that is preventing a healthy relationship from forming is "Curtis is not being generous with their time and effort".