Which factor is crucial when selecting a helmet for youth participants in sports?

Selecting a helmet for youth participants in sports with a focus on size and adjustability is critical because children's heads are still developing and can grow significantly. A properly fitting helmet ensures effective protection against head injuries, as a helmet that is too loose or poorly adjusted does not provide adequate support or safety.

Adjustability allows the helmet to accommodate growth over a period of time, ensuring that the athlete can use the helmet for an extended period without needing a new one frequently. A helmet that fits well increases the likelihood that it will be worn correctly and consistently, which is essential for protection during physical activities. Therefore, focusing on size and adjustability aligns with safety standards and the specific needs of youth athletes as they develop and participate in sports.