Since dogs always salivate at the sight of food, salivation in this case would be called a(n)

Since dogs always salivate at the sight of food, salivation in this case would be called an unconditioned response.

Explanation:

An unconditioned response is a natural or unlearned response that occurs automatically in reaction to an unconditioned stimulus. An unconditioned response does not require learning and it occurs without behavioral modification. From the given question; dogs always salivate at the sight of food. In this case, the sight of food is the unconditioned stimulus. Dogs respond to this stimulus by salivating and it occurs naturally.

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the answer is d.) homologous; have mammary glands