Heavily dependent of groundwater irrigation.
I believe the answer is: enable researchers to collect a wider array of data
Observing is being done by paying attention to the subjects. The amount of data that can be obtained is limited to the things that shown by the subject. Questioning is being done by asking the subject directly. So, we can ask the subject on why they do what they did and obtain a more deep and profound data compared to observing.
I believe i would say heart just because it sounds right heart or the mind?
Answer:
UK-wide voluntary initiatives are led primarily by WRAP (the Waste and Resources Action Programme), supported by funding from Defra, the devolved Administrations and the EU. Examples of current WRAP initiatives include: Courtauld 2025: a 10 year voluntary agreement targeting food waste across the food chain