(from the article, "Walking makes us healthier, happier and brainer") There is substantial data showing that walkers have lower rates of
Depression
O Extraversion
Walking
Openness

Depression.

Explanation:

In The Guardian article "It's a Superpower: How Walking Makes Us Healthier, Happier and Brainier", author Amy Fleming discusses how walking is good for one's health. On a discussion with neuroscientist Shane O’Mara, Amy delves into the benefits of walking.

In stanza 5, the author mentioned a study from 2018 that O'Mara cited about how active people are more inclined to have "the positive traits: openness, extraversion, and agreeableness." He continues: "There is substantial data showing that walkers have lower rates of depression, too".

Thus, the correct answer is depression.

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