Answer:
Observation, questionnaire, interview, focus group discussion, charts, graphs, and maps.
Step-by-step explanation:
Observation, questionnaire, interview and focus group discussion are the four data collection techniques are used in collecting and organizing evidence whereas charts, graphs, and maps are the tools which enable us to visualize the collecting and organizing evidence. All these data collection techniques and visual representations of information are used in the collection and organizing evidences to formed a conclusion for the study or research.