Conflict is a dynamic process in which the - and - are constantly changing and influencing one another.

Here are the solutions to the questions:

1. Conflict is a dynamic process in which the - and - are constantly changing and influencing one another.

a) structure, attitudes and behaviours

b) war, peace

c) struggle, attitude and structure

d) people, police and government

Explanation: Conflict is often understood through its three main components: the underlying structure or contradiction, the attitudes (perceptions, emotions) of the parties involved, and their behaviours (actions). These elements are dynamic and constantly interact. Option (a) best captures these core components.
The correct option is a).
$\boxed{\text{a) structure, attitudes and behaviours}}$

2. The opposite of conflict is -

a) war

b) thuggery

c) Peace

d) corruption

Explanation: Conflict refers to a state of disagreement or opposition, often involving hostility. The direct opposite of this state is peace, which signifies the absence of conflict or violence, and a state of harmony.
The correct option is c).
$\boxed{\text{c) Peace}}$

3. Economically-based groupings are called -

a) groups

b) regions

c) factions

d) classes

Explanation: In social sciences, particularly sociology and political economy, classes refer to groupings of individuals based on their economic position, wealth, income, and access to resources.
The correct option is d).
$\boxed{\text{d) classes}}$