Satellite radio is a subscription-based service, while HD radio is provided at no cost by current radio providers. Internet radio and podcasting have allowed many new programs and stations to be broadcast at low cost.
Answer: A- the antlers and horns are structural adaptations. The fighting is a behavioral adaptation.
Antlers and horns are physical adaptations that some mammals have acquired over time. However, fighting is not a physical feature but a behavioral adaptation used to beat other males during mating season.
Explanation:
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