By the time a child is about three, about how many brain connections will be present on average? one hundred one million one billion one trillion

By the time a child is about three, about 1 trillion of brain connections will be present on average. A brain of a child at birth is not yet fully developed. It is the part that is least developed. It is about one-fourth the size of an adult's brain. When the baby reached 3 years of age, it has made trillions of connections among the brain cells.

Answer up to 6,000 fatal crashes a year;