Read the passage, observe the image given below and answer the questions that follow.
The cartoon above refers to the problems of running Germany’s grand coalition government that includes the country's two major parties, namely the Christian Democratic Union and the Social Democratic Party. The two parties are rivals to each other. They had to form a coalition government because neither of them got a clear majority of seats on their own in the 2005 elections. They take divergent positions on several policy matters but jointly run the government.
Source (edited): NCERT
Why did the rival parties choose to make a coalition despite being rivals?
The government at the centre enforces policy decisions that affect the entire country including the people who support each party, thus the rivals preferred to make a coalition.