Core nations is the answer.
Core nations are nations that are relatively highly industrialized of which peripheral countries and semi-peripheral countries depend on.
I've pasted an image of the core, peripheral and semi-peripheral countries so you can make your own assumptions about these.
Hope it helped,
Happy homework/ study/ exam!
It is released into the atmosphere and mixed in with carbon monoxide
The 3 types of muscle tissue are Cardiac, Smooth and Skeletal. Cardiac muscle cells are located in the walls of the heart, appear striated, and are under involuntary control. Smooth muscle is found in the walls of the hollow organs like your intestines and stomach. They work automatically without you being aware of them. Skeletal muscles move the body. Skeletal muscle contractions pull on tendons, which are attached to bones.
Answer: Mass
Explanation: Hope this helps!