What Is the Meaning of Following Term

What is the meaning of following term:
-Colonialism

A) A trading company that was prominent in the Gold Coast.
B) The dominant group in Ghana.
C) A group in India that worked toward independence from British rule; Gandhi was a member.
D) A country's control of areas outside its territory.
E) The tale of her torture made the French look bad during the struggle for Algeria's independence.
F) A Portuguese trading post in Ghana.
G) Algeria's first president.
H) A group that was granted a charter by Queen Elizabeth to establish trading posts.
I) Battles of independence fought by colonized people.
J) A region in Africa named for its abundance of minerals.
K) The area between India and Pakistan.
L) Formerly the eastern part of Pakistan.
M) It was created to give India's Muslims a country of their own.
N) He formed the Convention People's Party in Ghana.
O) A state of mind or feeling based on belonging to a nation.