Because of the rain shadow effect, a dry region occurs on the downside of a mountain.
Option: A
<u>Explanation:</u>
In orographic rainfall, mountain acts as barrier and moisture laden wind get an obstacle in its path in the form of that mountain and cause rainfall in the windward sides of the hills (mountain) and create rain shadow region in the lee ward sides of the hills (mountain).
Because when moisture laden winds reach that side all the moisture in the winds dries up. For e.g. eastern part of western ghat mountain in the Peninsular India is an example of rain shadow region.
From the given options, the surveys, tests related to education, and unidentified questionnaires all belong to exempt research.
The fourth option is the correct answer.
<h3>What is meant by research?</h3>
Research is defined as the analysis of facts by examining the sources and available material about any topic.
Exempt research is one of the methods that focus on the study of human-related concepts where there is a minimum or no risk involved. The categories which are treated as exempt research can be education concepts, surveys, interview processes, federal-related research, food and taste studies, etc.
<u>Question's missing part:</u>
The following are the options related to the given question:
1) fraudulent research
2) non-ethical research
3) laboratory research
4) exempt research
Therefore, the provided categories are considered to be exempt research.
Learn more about the research in the related link:
brainly.com/question/18723483
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Diencephalon is referred to as the between brain.
The answer to this question is <span>specialties.
Companies with effective specialties will always become the go to place for the market for a product within a certain niche.
For example, despite of its various form of products, Coca cola's specialty has always been its soda beverages ever since the company was established.</span>
Answer:
The transcontinental railroad became the gateway to the West. In 1862 the Republican-led Congress appropriated vast areas of land that railroad companies could use to lay their tracks or sell to raise funds for construction.
