Question

ano ano ang mga hakbanging magpapatibay sa maayos na ugnayan ng tao at kapaligiran
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Answer 1

The most popular and traditional primary data examples/ sources used are:

Interview (personal interview, telephone, email).

Self-made surveys and questionnaires.

Field observations.

Experiments.

Action research.

New case studies.

Diary entries, letters, and other correspondence.

Eyewitness accounts etc.

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