What does a general survey site include as key features for observation?

A general survey site encompasses a variety of key features for observation, and the inclusion of a sketch map detailing features and transect line is crucial for understanding and documenting the area being studied. This sketch map helps researchers visualize the physical layout of the site, the distribution of different features within that area, and the precise path of the transect line, which is used for systematic sampling. Such detailed mapping allows for better analysis and comparison of data collected during the survey, enhancing the overall quality of the research.

The other options do not capture the comprehensive nature of a general survey site. For instance, limiting observations to only the species that inhabit the area, focusing solely on current temperature, or considering only the nearest urban settlement provide too narrow a view and do not represent the varied aspects that are essential for a thorough site survey. This makes the choice regarding the sketch map pivotal for effective observation and data collection.