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q_2(1) Sound waves enter the outer ear and travel through a narrow passageway called the ear canal, which leads to the eardrum. The eardrum vibrates from the incoming sound waves and sends these vibrations to three tiny bones in the middle ear. These bones are called the malleus, incus, and stapes.
2) a) exercise is oneof the best thing you can do to low high blood pressure.
b) in fact, 150 minutes of moderate exercise ,such as walking, or 75 minutes of vigorous exercise , such as running ,per week ,can help lower blood pressure improve your heart health.
Q_3 (1) Eating junk food on a regular basis can lead to an increased risk of obesity and chronic diseases like cardiovascular disease, type 2 diabetes, non-alcoholic fatty liver disease and some cancers. We know Australian's eat too much junk food. 35% of adults' daily energy intake (kilojoules) comes from junk food.
2) Trees absorb the sound vibrations produced by various sources and hence leading in prevention of noise pollution. It also provide shades and make the roads beautiful.
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