Answer:
A.
Explanation:
To find out if a call of an animal is missing.
It would be A. because the selection said, "The more scientist's listen to these kind of recordings, the more they notice when expected call are missing".
Hello, the answer is:
Plane mirror - The image formed by a plane mirror is always upright, virtual and the same size as the object no matter where the object is placed in front of the mirror. ... Convex mirror – The image formed by a convex mirror is always upright, virtual and diminished no matter the distance of the object from the mirror
