Why might the scientists have chosen changes in CO2 as an indicator of photosynthesis rather than
changes in the quantity of energy rich compounds
such as ATP and NADPH within the leaves?

Because it is easier to measure

Explanation:

Measuring the production of ATP or NADPH is challenging and requires some advanced methods in a a research laboratory.

However, the production of a gas is much easier to measure, and can be done in school laboratories. For example, by observing the production of bubbles or using a gas cylinder can tell how much CO2 is being produced.

c

explanation:

idk

glacial erosion, the picking up and movement of earth beneath a glacier, is also referred to as plucking. erosion and transportation of individual pieces of bedrock, especially large "joint block occur as a result of this glacial erosion. plucking is type of erosion in which rocks become frozen into the bottom and sides of the glacier.as the glacier moves downhill it 'plucks' the rocks frozen into the glacier from the ground.