Answer:
APA and MLA are the two format sources.
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Deforestation, the chopping off of the trees that can take thousands or even millions of years to grow again<span />
        
             
        
        
        
A. Picking up sound waves is the stage of listening that most people refer to as hearing.
<h3>
What is hearing?</h3>
Hearing, or auditory perception, is the ability to perceive sounds through an organ, such as an ear, by detecting vibrations as periodic changes in the pressure of a surrounding medium.
During learning process, when someone picks up the sound waves directed to him/her, it is known as the act of hearing,
Thus, picking up sound waves is the stage of listening that most people refer to as hearing.
Learn more about hearing here: brainly.com/question/14185060
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Answer: 
Explanation:
The angular diameter  of a spherical object is given by the following formula:
 of a spherical object is given by the following formula:

Where:
 is the actual diameter
 is the actual diameter
 is the distance to the spherical object
 is the distance to the spherical object
Hence:

 This is the angular diameter
 This is the angular diameter