Answer:
a. autistic disorder.
Explanation:
Autistic disorder -
It is the development and neurological disorder which is seen in the first three year after the birth .
The children suffering with the disorder of autistic , tends to live in their own world , showing no response to the present environment and lack of interest .
These children show very odd and strange behavior and even these children lack any eye contact , and avoid communication and interest on the present environment.
Hence, from the question,
Robin is also suffering from the similar disorder of autistic .
The correct answer is A) the Native Americans were forced to move west of the Mississippi River.
In the late 1700's many pioneers started moving into the Ohio Valley. The impact that this white movement had on the Native Americans that already lived in the Ohio Valley was that the Native Americans were forced to move west of the Mississippi River.
At the end of the 18th. century, white people started to move west and settled in the territories that formerly belonged to many Native American Indian tribes. Tribes in the Ohio River Valley were displaced due to the establishing of white Americans that had a different culture and tradition. These Native American Indians were displaced to other land and had to move further west to keep their own rituals, customs, and traditions.