Explanation:

- The act of different political parties coming together to win an election is best described by a specific social process.

- Co-operation: This is when individuals or groups work together towards a common goal. Political parties forming alliances and working together for electoral success is a classic example of co-operation.

- Accommodation: This means adjusting differences between groups by mutual agreement, often to coexist peacefully despite differences, but doesn't necessarily involve teamwork for a shared goal.

- Consensus: It refers to general agreement among a group, but not necessarily about working *together* for a specific purpose.

- Integration: Implies blending or unifying diverse groups into a single whole, often more permanent or deep-seated than co-operating temporarily for elections.

Correct Answer: Option 1 – Co-operation