Animations that grafted emotion-conveying faces onto toy trains have been developed to alleviate symptoms of

The correct answer is Autism.

Explanation:

According to research, conveying human faces and gestures on cartoon elements such as trains, cars, lamps, and other objects may help children with autism understand human moods, emotions, and feelings.

It is known that one of the most common symptoms of children diagnosed with autism is the difficulty in understanding other's emotions and feelings which results in the development of poor interpersonal skills.

Animated stories that focus on explaining emotions may aid those children with disorders in the autistic spectrum to understand them, and help them communicate more effectively with their peers.

In conclusion, Animations that grafted emotion-conveying faces onto toy trains have been developed to alleviate symptoms of: Autism.