Writing prompt: A Brief Introduction to the UK

Student essay:
Britain, the full name of The United Kingdom of Great Britain and Northern Ireland. Britain is made up of England, Northern Ireland, Scotland and Welsh.
The United Kingdom merged with Ireland in 1801 and the United Kingdom's official became The United Kingdom of Great Britain and Northern Ireland.
Britain in the early 19th century reached its peak, at the time, accounting for a quarter of the world's population; territorial accounted for a quarter of the total land area in the world. Britain is the first industrialized country in the world. It was known as the Empire on which the suns never sat.
As time goes by, Britain is still a big country in the world.

Corrected essay:
Britain, the full name of The United Kingdom of Great Britain and Northern Ireland, is made up of England, Northern Ireland, Scotland and Wales.
The United Kingdom merged with Ireland in 1801, and its official name became The United Kingdom of Great Britain and Northern Ireland.
Britain in the early 19th century reached its peak, at the time accounting for a quarter of the world's population and a quarter of the total land area in the world. Britain is the first industrialized country in the world. It was known as the Empire on which the sun never set.
As time goes by, Britain is still a major country in the world.