Documentation descriptive details of events in nature -amounts, sizes, colors, smell, behavior, texture -for example-eclipse observations is called

field studies
controlled environment
systematic observations

field studies

Explanation:

The documentation and collection of descriptive details of events in nature such as amounts, sizes, colors, smell , behavior, texture e.t.c are all categorized as field studies.

It involves the gathering of raw data outside a laboratory.

ecotourism pay for conservation efforts.

x would be the most and the least would be y because there are more fruit   and seeds than flock z has insects