How as is train an am

A train is not an "am"

Step-by-step explanation:

A train is a a series of railroad cars moved as a unit by a locomotive or by integral motors.

Length of Time

Step-by-step explanation:

Dog training sessions should last no more than 15 minutes. Young puppies or dogs who are easily distracted may need even shorter sessions. If you run your training session too long, dogs get distracted and bored, and there's a good chance they'll start making mistakes.