A)Radio
microwaves wouldn't make sense with the next word in the question, and mechanical wouldn't make sense.
The global air temperature increases after the volcanic eruptions. It has also been observed that this increase in air temperature causes lowered winter seasons, acid rain, haze, dust, and ash. This causes problems in breathing and other disorders in humans as well as animals.
From the insects and the worms they eat.
Answer:
a. work ethics, because the principle that hard work is intrinsically virtuous or worthy of reward
Explanation:
