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To gather information from many other people.

Explanation:

Surveys are used to gain insight into many individuals' experiences or opinions.

The first option is incorrect, as surveys are not used to gain the perspective of a single individual.

The third option is incorrect, as surveys gather information in the present - it is impossible to survey someone who is not currently alive and willing to take the survey.

The fourth option is not applicable to a research project. Research projects aim to present objective information, and imagining how someone else may view an event is not applicable to gaining objective truth through research.