Answer:
Secondary data
Explanation:
Secondary data is the data collected by the researcher for investigation previously. This data can be assessed by the researcher. The secondary data is opposite or contrast to the primary data. Primary data is like the data collected directly.
The secondary is the data which increases the sampling data. It is the source of a large research project. The big source of secondary data is government libraries, internet, departments. Social media is the largest source of research. It is is the interest source for investigators.