Please choose the correct ending to complete the given sentence: Pets and Animals: [header] How to pick the perfect puppy [title] Observe the puppy's parents. [step] Genetics play a significant role in how a puppy will look and behave. It is likely that the puppy you are considering will have many of the same physical and behavioral traits as his parents.

Ending1: It's a good idea to closely observe the parents who are working closely with the puppy. Ask them questions about their lifestyle and personality to determine whether they are ideal parents for your puppy. Ending2: However, their parents certainly want to make sure your puppy is a good-looking and active puppy that they may breed and have a good relationship with. Behaviors that are easy to mimic include a compassionate but inquisitive expression, a sensitive smile, and a compact embrace. Ending3: Therefore, taking a long a good look at his parents first will help you determine if the puppy will be perfect for you. [substeps] If you are working with a breeder, ask him or her if you can see the puppy's parents. Ending4: For example, the mother might have more anxiety and independence than her father who is more protective. However, your puppy will have a tendency to be quite athletic during the first year of life, with a weight around 75% of his adult weight.

Answer format: ending1/ending2/ending3/ending4