Effective fitting of a football helmet ensures which of the following?

A properly fitted football helmet is crucial for ensuring the safety and protection of the player. A helmet that fits snugly with no gaps means that it will provide adequate coverage and support to the player's head during impacts. This snug fit helps in reducing movement of the helmet during play, which is vital for minimizing the risk of head injuries such as concussions.

When there are gaps, or if the helmet shifts during play, it can lead to insufficient protection and increase the likelihood of injury. Moreover, if the chin strap is too loose, it compromises the overall fit of the helmet as well, making it less reliable in protecting the athlete. Therefore, a snug fit without gaps is essential for maximum protection and safety on the field.