According to the centers for disease control and preventions (2013)estimates, children has an autism spectrum disorder in 2008.

1 in 88 children has an autism spectrum disorder in 2008

Explanation:

Autism Spectrum Disorder- this is a disorder that is related to a person's nervous system and brain development. It affects how the person socializes or communicates with other people. A person with this condition has the following symptoms: abnormal body posture, abnormal tone of voice, delay in speaking, avoidance of eye contact, flat speech, repetitive behaviors and the like. This is common in a child's early life.

In the United States, it has been estimated that 1 in every 88 children has an autism spectrum disorder.  Most of these kids were born in the year 2000. This is even expected to increase in the coming years. The number estimated is considered huge because it greatly affects every family. It puts stress on every family member, not only financially but also physically, mentally and emotionally.

i believe the answer would be negative peer pressure

the gravitational force on an object increase as the mass of an object also, im not going to report you, but this question should be under the science category, not health