Final answer:
Direct observation and measurements will yield direct data in a needs assessment of a community.
Step-by-step explanation:
The nurse should identify that direct observation and measurements will yield direct data in a needs assessment of a community. While surveys and questionnaires, focus group discussions, and review of existing health records can provide valuable information, direct observation and measurements allow the nurse to gather data firsthand by directly observing and measuring the community's health status and needs. For example, the nurse can observe the conditions in the community and measure factors like air quality, water quality, and population health indicators to obtain direct data.