Answer:
Option A, To calculate the dry weight of the entire spinach plant
Step-by-step explanation:
Total biological matter contained in any organism is known as biomass. The basic unit of biomass is dry weight or expressed in terms of amount of bio element such as carbon or nitrogen. It is used as a parameter for accessing the health of any biological system.
Practically biomass is the measurement of net change in the amount of biomass within a certain time period.
Therefore, biomass of spinach plant will be the dry weight of entire spinach plant
Hence, option A is correct