Weathering because it's "wearing" down something to make sediment
Answer:
Brain
Explanation:
The brain has nerve endings that responds to stimulations such as sensory stimulations
An electronic cardiac monitor is the preferred method for assessing heart rate during chest compressions. While a person is performing chest compressions on a patient, he or she is hooked up to the electronic cardiac monitor so that the doctor can see exactly how fast the patient's heart is pumping blood. Cardiac monitoring is the best method do assess this.
You would want this observation to be in an area with a lot of biotic and abiotic factors, so the best place for it is an ecosystem.