During boy scout camp, cole was randomly selected to be on one baseball team and ty on the opposing team. before the game started, cole and ty were each convinced that his team was the better one. the boys' beliefs best illustrate a(n) bias.

ingroup bias

Explanation:

Ingroup bias refers to how we usually favor the groups with which we identify by thinking their character , product etc is better when compared to those of the outgroup. We usually voice this out sometimes more than we voice our rejection of the outergroup , we always want to emphasize how great we are , how powerful our in-group is , how influential it is all the positive things we can think of and we tend to megasize everything that is positive when we associate it with our in-group.

Cole obviously think that his team is better when compared to the opposing one, because his team is his ingroup.