Assertion: In a democratic country, there are a large number of political parties. More than 750 parties exist in India.
Reason: The level of participation of people in the activities of political parties is fairly high in a democracy.

The assertion states that there are a large number of political parties in a democratic country, and it provides the example of India where over 750 parties exist. The reason given for this is that the level of participation of people in the activities of political parties is fairly high in a democracy. Let's analyze this statement in detail.

1. Political Pluralism:
In a democratic country, political pluralism is one of the fundamental principles. This means that multiple political parties are allowed to exist and compete for power. This ensures that various ideologies, opinions, and interests are represented in the political landscape. It provides citizens with a wide range of choices and allows them to align themselves with a party that best represents their beliefs and aspirations.

2. Freedom of Association:
Democracy guarantees citizens the freedom to form and join political parties. This right allows individuals to come together based on shared values, ideologies, or social issues. As a result, a diverse range of parties emerge, each catering to different sections of society. These parties act as platforms for individuals to express their political opinions and participate actively in the democratic process.

3. Active Citizen Participation:
The reason provided in the assertion suggests that the level of participation of people in the activities of political parties is fairly high in a democracy. In a democratic country, citizens have the right to participate in political activities, such as attending party meetings, joining campaigns, volunteering, and even contesting elections. This high level of participation leads to the formation of numerous political parties as citizens actively engage in politics and strive to represent their interests.

4. Representation of Diverse Interests:
With a large number of political parties, a wide range of interests and concerns can be represented in the democratic system. Different parties cater to various sections of society, including regional, linguistic, religious, and ethnic groups. This ensures that the voices of marginalized or minority communities are not overlooked, and their issues are given due consideration in the decision-making process.

Conclusion:
In conclusion, the presence of a large number of political parties in a democratic country like India is a result of political pluralism, freedom of association, active citizen participation, and the representation of diverse interests. The assertion and reason provided are valid, as they highlight the democratic principles that contribute to the existence of numerous political parties in such a system.