Final answer:
Relying solely on a few main informants for ethnographic work can lead to biased and unreliable findings, limited perspectives, and missing valuable insights.
Step-by-step explanation:
Relying solely on a few main informants for ethnographic work can pose several problems. First, it may lead to biased research practices and the potential for confirming preconceived ideas about the culture being studied. This can result in unreliable and inaccurate findings. Second, relying on a limited number of informants may lead to a lack of diverse perspectives and a limited understanding of the culture or society under study. Third, relying solely on a few informants may miss out on valuable insights and information from other members of the community who may have different experiences, roles, or knowledge.