A hawk is best defined as what type of bird?

A hawk encompasses a variety of characteristics and classifications that include all the definitions provided in the options.

Firstly, the description of hawks as a generic term for diurnal birds of prey that are neither eagles nor vultures accurately captures the broader context of what hawks represent in avian taxonomy. They are typically characterized by their hunting prowess during daylight hours and their general ecological niche as predatory birds.

Secondly, while not all hawks belong to the genus Accipiter, this genus includes many species commonly referred to as hawks, such as goshawks and sharp-shinned hawks. This classification highlights the diversity of species within the broader category of hawks.

Thirdly, the physical characteristics outlined—diurnal habits, short rounded wings, long tails, and light eyes—are indeed typical for many hawks and contribute to their identification and natural behaviors. These traits differentiate them from other raptor families.

Since each of these definitions adds a layer of context and precision to the understanding of hawks, it's clear that all of them together provide a comprehensive definition of what a hawk is. Thus, the answer is entirely suitable and reflective of the multifaceted nature of hawks within ornithology.