The correct answer is A. understanding.
Communal amity is a state of peace and harmony between different groups of people in a community. It is important to maintain and promote communal amity because it helps to create a more cohesive and stable society. When people understand and respect each other, they are less likely to engage in conflict. This can lead to a number of benefits, such as improved economic development, reduced crime rates, and increased social cohesion.
Option B, bondage, is not the correct answer because it refers to a state of slavery or servitude. This is not something that is desirable or necessary for communal amity.
Option C, friendship, is not the correct answer because it refers to a personal relationship between two people. This is not the same as communal amity, which is a state of peace and harmony between different groups of people.
Option D, contention, is not the correct answer because it refers to a state of conflict or disagreement. This is not something that is conducive to communal amity.