Answer:
el estudio de la naturaleza fundamental del conocimiento, la realidad y la existencia, especialmente cuando se considera una disciplina académica.
Explanation:
The answer to the question above is FIELDWORK. From the term itself, the work involves in the "field" or in the actual environment wherein the researcher him or herself immerses in the natural environment in order to accomplish a given work or task. This already involves participant observation since the researcher witnesses the actual behavior of the participants in the field.
Their influence may be larger than their numbers
