Final answer:
The most effective defensive formation varies depending on the sport being played. Examples of effective defensive formations include the box and one in basketball, the flat line in soccer, and the slant in American football.
Step-by-step explanation:
The most effective defensive formation in sports depends on the specific sport being played. Since the question does not specify a sport, it is difficult to determine which formation is the most effective. However, I can provide some examples of effective defensive formations in different sports:
1. In basketball, the box and one defense is commonly used to shut down a star player. In this formation, four defensive players form a box to guard the four corners of the court, while one defender closely guards the star player.
2. In soccer, the flat line formation is often used. In this formation, defenders line up horizontally across the field, creating a solid defensive wall to prevent the opposing team from advancing.
3. In American football, the slant formation is commonly used to disrupt the opposing team's offensive line. In this formation, the defensive linemen angle their positions to one side, aiming to quickly penetrate the offensive line and disrupt plays.
Without knowing the sport in question, it is difficult to determine the most effective defensive formation. It's important to consider factors such as the strengths and weaknesses of the specific team, the style of play, and the opponent's strategies when choosing a defensive formation.