Answer:
The amazing life of an innocent young boy and his dog.
Step-by-step explanation:
Remember, the theme of a story refers to the main concern of a story.
We can make this conclusion because the animation depicts a young boy, who then receives a present (a dog) that becomes part of his life.
However, the boy's innocence is portrayed when a later animation shows that this boy is actually disabled (he walks with crouches). Hence, "The amazing life of an innocent young boy and his dog" makes a good theme.