I am from Canada so it would matter on the dialect but here it goes:
There’s no doubt that environmental effects including living standard(s), ( )backgrounds of one’s family, economic conditions and educational status are ( )especially influence (in) the development of one's intelligence. Among ( ) the above named, educational status is obviously one of the most essential factors that effect the development of intelligence.
Think of a child whose parents are (both) well-educated. Apparently, the parents will create a ( ) educational atmosphere when their child comes to ( ) this world, ( )therefore resulting a child who will be imperceptibly influenced by what parents say or act, thus ( )promoting his or her intelligence gradually.
As ( ) a saying goes, “Every coin has two sides.”Consequently, it doesn’t mean well-education will ( )undoubtfully develop ( )their child's intelligence. A child with poor-educated parents can also be quite intelligent with ( )their parent's effort . However, the parents couldn’t offer the child an appropriate way to develop intelligence in certain extent.
There’s no assured answer to what is the most important environmental effects on the development of intelligence. Nevertheless, we can’t deny that educational status do effect the development of intelligence and (that) a child who is in a better educational status is more likely to develop his or her intelligence.