This situation is an example of mainstreaming
This refers to the situation where a student with special needs is placed together in a regular classroom with other students for a given time period.
Hence, we can see that based on the fact that Chris has delayed development mentally and he is put in a regular class with other students without disabilities, this situation is an example of mainstreaming
Read more about mainstreaming here:
https://brainly.com/question/1689868
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