Which of the following is a primary data source?

• A. Measurements collected in the field
• B. Government statistics
• C. Online datasets
• D. Previous fieldwork reports

Answer: (A)

Primary data come from information you collect yourself for your own study. Measurements collected in the field are a clear example because you’re gathering data directly from the site you’re studying, first-hand and specifically for your project. This gives you control over what you measure, how you measure it, and when you collect it, making it highly relevant and up-to-date for your research questions.

The other sources are secondary data. Government statistics, online datasets, and previous fieldwork reports were produced by others for different purposes and are then used by you. They can provide useful context or baseline comparisons, but they aren’t data you collected yourself for your current study.