Question

where are most research labs located? universities private companies government agencies

Explanation:

Research labs are often found in universities. Universities have a long - standing tradition of academic research, with access to a wide range of resources such as academic staff, students (who can be research assistants), and funding for research projects. They also have a culture of knowledge creation and dissemination that is conducive to research. While private companies and government agencies also have research labs, universities typically have a larger number of diverse research labs covering various fields of study.

Answer:

universities