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max2010maxim [7]
3 years ago
13

I NEED HELP PLEASE. (I will give brainliest to the correct answer.)

Biology
2 answers:
chubhunter [2.5K]3 years ago
8 0
A.information about the product testing in a study that includes a control group, because testing the product helps prove the company's claim. hope this helps
Levart [38]3 years ago
4 0

The correct answer is option a. Information about product testing in a study that includes a control group.

The experiments and the visible result creates a trust about the use of the product. The advertisement can include the observation of product testing, in which a control group should be present. In the control group, the product should not be used and in the experimental group the product should be used. A comparison of the control group and experimental group can help in observing the difference with and without use of the product.

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AVprozaik [17]

Answer:

The stratosphere

contains the ozone layer ,

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has strong, steady winds , and

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Explanation:

The stratosphere is the atmospheric layer between 10 km and 50 km above the Earth's surface.

It includes the ozone layer, which is at an altitude of about 20 km.

It has strong, steady winds that can reach as high as 220 km/h.

Passenger aircraft generally fly in the lower levels of the stratosphere, at altitudes of about 10 km to 12 km.

Temperatures increase with altitude, from -50 °C at 10 km to -3 °C at 50 km.

A is wrong. The mesosphere (altitude 50 km to 85 km) is the coldest of the atmospheric layers, with temperatures as low as -90 °C at 85 km.

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