1. Comparative structure: "On one hand, the variety serves... On the other hand, an excessive number..." uses a comparative structure to discuss two sides of an issue, enhancing the complexity of the argument.
2. Infinitive of purpose: "ensuring they cater to both mainstream and niche markets" uses the infinitive form to express purpose, adding clarity and purpose to the broadcasters' actions.
3. Modal verb for necessity: "Broadcasters need to strike a balance" uses the modal verb "need" to express necessity, emphasizing the importance of finding a balance in sports broadcasting.