Con·cen·tra·tion
/ˌkänsənˈtrāSH(ə)n/
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noun
1.
the action or power of focusing one's attention or mental effort.
"frowning in concentration"
Answer:
for a hypothesis to be part of an accepted theory, it must have been extensively tested through experiments under different conditions
Sara should replace the first old washing machine with a new one which has an efficiency of 10 gallons per load.
<h3>What is the meaning of eco-friendly?</h3>
An old washing machine uses = 35 gallons of water per load.
A new washing machine uses = 10 gallons of water per load.
Hence, the difference between the number of gallons used by the an old washing machine and a new washing machine's efficiency of using water is 15 gallons which will save more water.
Hence, sara should replace the first old washing machine with a new one which has an efficiency of 10 gallons per load.
Learn more about eco-friendly here:
brainly.com/question/11541448
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Answer;
To protect the rest of the esophagus from sharp food particles and stomach acid.
Explanation;
The mucosa is the innermost layer, and functions in absorption and secretion. It is composed of epithelium cells and a thin connective tissue.
It contains specialized goblet cells that secrete sticky mucus throughout the GI tract, that prevents the corrosion of the stomach walls and esophagus from sharp food particles and the acids from the stomach.
I believe the correct answer is A.
Hope this helps!
