Coefficients of Absorption for Common Materials
Perforated acoustic ceiling material 60%
Heavy curtains 50%
Carpeting 20%
Wood 5%
Plaster 3%
Clay tile 3%
Concrete 2%
The answer is C. Heavy curtains
Answer:
the answer is A decrease in food supply and prediation.
AnswerI think its D(sorry if im mistaken)
Explanation:
after some research I am pretty sure about it, hope its right.