Which of the following statements best illustrates Weber’s law? A. The size of the difference threshold is greater for heavier objects than for lighter ones.
B. The size of the difference threshold is based not on the weight of the object, but the size.
C. The size of the different threshold is always the same, regardless of the size or weight of the object.
D. The size of the difference threshold is smaller for heavier objects than for lighter ones.

the endocrine system secretes hormones into blood and other body fluids. these chemicals are important for metabolism, growth, water and mineral balance, and the response to stress. hormones provide feedback to the brain to affect neural processing. reproductive hormones affect the development of the nervous system.

from my research i have to the conclusion that decomposers, such as fungi, bacteria and invertebrates, play a critical role in nutrient cycling and without them the earth's ecosystem may not support life as we know it. elements such as carbon, nitrogen and phosphorus exist in limited amounts on earth, although huge amounts of carbon are being released into the atmosphere from underground sources now by humans. it is still extremely important that other nutrients be retained by the process of re-use. decomposers are organisms that are able to chemically break down dead material and make these elements available for use by other organisms. without this breakdown of dead material, dead bodies would pile up. so decomposers also play a role in clean up also. without them, life might not continue as we know it and dead material would overwhelm the earth.    

the answer is definitely a

copper and glass have high electrical conductivity