Write a note on the British and American accents?Please answer.

Not sure exactly what you are asking, but an give you some
ideas about how the British accent evolved into the American one in North America over
time.

When Britain established its first permanent colony
in North America, many of the immigrants were ethnically English, and the ones that
followed often were Scots-Irish indentured servants.  Over the next 169 years before
independence was declared, a flood of immigrants of many nationalities, including
French, Germans, Swiss, Dutch and African slaves all arrived on the continent, bringing
with them their own dialects and languages.

Over time, most
of these groups intermixed and intermarried, and the ethnic lines between settlements
blurred.  Vocabulary was borrowed from language to language, and new, uniquely American
terms emerged.  By the 1750s and the French and Indian War, the British soldiers and
officers who were sent the North America observed that "Colonial English" was quite
different than what they spoke, in terms of accent and
content.

The process of continual accent and vocabulary
change has continued into the present day.