Most sports, like basketball, involve more than a single player.

Several players combined to form a single group are considered a team. When you hear the word team, there has to be someone who will lead it.

I am, definitely, not referring to the coach of the team. What I mean is a leader among the players. The player who steps up and demonstrates leadership skills, both on the court and off the court, is widely considered to be the team captain.

Simple Recall
To better understand this topic, let us try to analyze how Webster described the following terms:

• Responsibility – a moral obligation or duty; a charge or trust.
• Team – a group of people participating in a sport together.