1. Explain some of the factors that can influence public policy and give some
examples of those?

Many factors affect the policymaking process, including:
Innovation and knowledge:
Context (social, political, and economic):
Specific events, particularly traumatic events, that necessitate a political response...
Institutional factors:
Influences from outside:

Examples:

Public sentiment, economic conditions, new scientific advances, technological change, and interest groups are some of these variables. Nongovernmental organizations are groups of people or organizations that come together to promote a shared political, economic, or social agenda.

The problem of malnutrition in bangladesh is caused in part by "over population."hope my answer has you : )