________refers to the manipulation of boundaries of constituencies in order to win more seats,

Step 1: Analyze the question The question asks for the term describing the manipulation of constituency boundaries to gain an unfair advantage (more seats) for a party or group.

Step 2: Explain the concept

• Delimitation is the legitimate, routine process of drawing or fixing constituency boundaries (in Nigeria, this is done by INEC). It is neutral and has no element of cheating.
• Devolution is the transfer of powers from the central government to regional or local governments.
• Determination is not a political-science term for boundary issues. It simply means firmness of purpose or the act of deciding.
• Gerrymandering is the deliberate manipulation of electoral boundaries to favour one party or group and win more seats. The term comes from Elbridge Gerry, a Governor of Massachusetts, who in 1812 approved a district shaped like a salamander. The words "Gerry" and "salamander" combined to give "gerrymander."

Step 3: Match the definition The keywords are "manipulation" and "in order to win more seats." These point directly to unfair boundary-drawing, which is gerrymandering, not the neutral process of delimitation.

Step 4: Answer The correct option is D. Gerrymandering.

Exam tip: Remember "Gerry-MANDER = MANipulate boundaries." If a question mentions manipulation or unfair advantage with boundaries, think gerrymandering. If it only mentions fixing or drawing boundaries, think delimitation.