17.ringworm infection is an example of______.
a.respiratory disease
b.skin disease
c.gastrointestinal
s.vector-borne
18.malaria is an example of what kind of disease?
a.respiratory
b.skin
c.gastrointestinal
d.vector-borne
19.it is an unwanted or disturbing sound.
a.sound
b.music
c.noise
d.voice
20.where do we usually experience noise pollution?
a.at home
b.rural areas
c.busy streets
d.at the farm
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