A collection of reactions of the people on issues that affect them is referred to as

Step 1: Analyze the question The question asks for the term describing a collection of people's reactions (views, attitudes) on issues that affect them.

Step 2: Explain the concept

• Public opinion is the sum or collection of the views, attitudes and reactions of the people on matters of public concern, such as government policies, elections, or social issues.
• Opinion poll is a method (survey) used to measure public opinion. It is a tool, not the collection of reactions itself.
• Public interest is the general welfare or well-being of the society, not people's reactions.
• Pressure groups are organized groups that try to influence government policy to protect their interests.
• Sentiments are personal feelings or emotions, not a collective body of reactions to issues.

Step 3: Apply to the question The phrase "a collection of reactions of the people on issues that affect them" matches the standard definition of public opinion: the collective views of the people on matters affecting them. An opinion poll only measures these views, and the other options do not fit the definition.

Step 4: Answer The correct option is C. public opinion.

Tip: Remember the difference: public opinion is what people think, while an opinion poll is how we find out what they think. If a question says "collection of views/reactions," go for public opinion. If it says "survey" or "method of measuring," go for opinion poll.