Plant cells have what is perhaps the most complex outer coverings. Plant cell walls are made largely of cellulose which forms strong, highly rigid, almost indigestible coverings that protect the cell and gives it shape.
Answer: process indicators
Explanation:
Process indicators are used to measure the steps in a process and tasks people or devices do, from conducting appropriate tests, to making a diagnosis, to carrying out a treatment.
It can be used to AID diagnosis, and OBJECTIVELY measure the response of a patient to therapy.
So, Process indicators is the right answer
