Goal: How to teach a child to be responsible?

Which of the following methods is more reasonable for accomplishing this goal?

OPTIONS:
- Get a dog and teach the child what the dog needs, over time let the child take over the responsibilities themselves
- Get a dog and teach the child what the dog likes, over time let the dog take over the responsibilities themselves
Get a dog and teach the child what the dog needs, over time let the child take over the responsibilities themselves