A19th-century explorer crossing a desert has run out of water. he has the best chance of surviving if he can finda. a rain shadow. b. an ephemeral stream. c. an oasis. d. a playa.

The correct answer is option C. an oasis.

Explanation:

An oasis is a geographical area or unexpected natural water source that is present in the desert. These water resources provides the very much needed relief by providing water to the organisms, animals and help in growing vegetation in the desert and dry area.

It can provide water and relief from sun and heat by providing shade and needed water as it offers not just water but a shelter to the animals, if it is a large enough for human settlements and crop nearby it.

Thus, the correct answer is option C. an oasis.

C. An oasis

Explanation:

An oasis is a cultivated area in a desert or semi-desert environment.

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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