Examine the diagram. A diagram with two bubbles and two arrows in the middle pointing opposite ways. The left bubble says, "The environment affects human behavior. Based on this diagram, which is the best explanation of why environmental problems are difficult to solve? The environmental problems are not caused by people. The environment is too complex for people to understand it. People change the environment in different ways, which causes human behavior to change. Humans are part of the environment, so they cannot have a large impact on the environment.

to prevent people from getting the ebola virus, countries around the world paid to doctors develop a new vaccine. now that the vaccine has been made, doctors will need to experiment on a large number of people to find out if it works safely.

what is the greatest limitation that scientists are dealing with as they try to figure out how to experiment with the ebola vaccine?

meditation is a practice of sitting still and quiet for minutes or even hours. it has been practiced for thousands of years and is even a part of religious practices for some people. carefully controlled, repeated measurements of brain activity have shown that meditation does increase certain chemicals in the brain and even grows the part of the brain that people connect with their current surroundings and activities.

are claims about the effects of meditation most likely scientific or pseudoscientific?

not pseudoscientific, because people have made claims about it but scientific observations have not been made

a progressive heart disease that affects pumping action of the heart muscles.