Final answer:
The correct ratio of adult dogs to puppies in a kennel, where there are 2 adult dogs for every 3 puppies, is expressed as 2:3.
Step-by-step explanation:
The question is asking for the ratio of adult dogs to puppies in a kennel. The correct ratio given is 2 adult dogs to 3 puppies. Therefore, the answer is a) 2:3.
A ratio compares two quantities, which can be written in different forms, such as fractions, with a colon, or with the word "to." In this case, we use a colon to represent the ratio. Since we are given that there are two adult dogs for every three puppies, the ratio is 2:3. This is the most direct way to express the relationship between the two groups of dogs in the kennel.