Answer:
Ridge and valley Provinces
Explanation:
This particular region is a major producer for Rocks such as sandstone, shale, and coal coal-bearing beds in United States.
The geographical structure of the region in Ridge and valley Provinces were very difficult to reach (even using modern means of transportation). This terrain make it impossible for the company to hire the people from outside the area and let them commute to the workplace everyday.
This is why companies who want to utilize the resources that exist in this territory have to build a mining town there and make the workers live there during the operation.
Answer:A weak immune system
Explanation:
When people get older their immune system becomes weak including the function of the T cells which are cells responsible for fighting infections.
This means it becomes hard to recover from a flue when someone get sick and they are always prone to sickness since their immune system no longer has the power to fight infections.
Answer:
Pavlov's theory of stimulus substitution is the combination of several techniques that are called the spectrum of the umbrella in classical conditioning. It occurs with the pairing with the new stimulus to the already conditioned stimulus. When this procedure occurs new stimulus paired with the conditioned stimulus, there are chances of replacing already conditioned stimulus with a new stimulus.
We can take an example of a rat that is to be conditioned to respond to a whistle which related to fed then can add a flashlight as a signal with a whistle. When light is there then rat fed. The light signal is then substituted part of the whistle.
1. Universe
2. Milky way galaxy
3. Solar system
4. Earth
hope this helps :)
Your answer is most likely C. :) Glad I could help!!
