1.

Fill in the blanks with the proper words.(a) The propagation of sound does not occur through a ........... .(b) Noise pollution is a .......... issue.(c) The sound which is disagreeable to the ears is called..... .(d) Noise has adverse effects on our .......... .

Answer» Fill in the blanks with the proper words.

(a) The propagation of sound does not occur through a ........... .

(b) Noise pollution is a .......... issue.

(c) The sound which is disagreeable to the ears is called..... .

(d) Noise has adverse effects on our .......... .


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