It May Be Difficult for Young Matthew, Who Is Only

Multiple Choice

It may be difficult for young Matthew, who is only 4 years of age, to understand the difference between the iPad that his mother uses, the Kindle that his brother uses, and the Galaxy tablet that his sister uses. After all, all of them are tablets, have touch screens, are electronic technology, and run "apps" that include games and educational programs. These similarities remind us of the concept of ___________, which refers to the fact that animals tend to share many different properties.

A) obstruction
B) convergence
C) crowding
D) overlapping