Why might a scientist use a simulation in a controlled experiment? a. to observe a 1,000-year process in a single day b. to have fun while only appearing to do meaningful work c. to replace a costly experiment with something cheaper d. to avoid having to record observations by hand

A. To observe a 1000 year process in a single day

after receiving a stimus, the sensory receptors send(s) signals to the appropriate area of the body.  

the must be sensory neurons.  

hope its .

the cost of mining is extremely low compared to the money earned from mining, creating income to improve the environment.