I believe it’s D because they’re talking about how to get prevent mosquitoes and mosquitoes bite
Im on that to, maybe i can help you !! :)
Answer:
hertz
Explanation:
Usually frequency is measured in the hertz unit, named in honor of the 19th-century German physicist Heinrich Rudolf Hertz. The hertz measurement, abbreviated Hz, is the number of waves that pass by per second. For example, an "A" note on a violin string vibrates at about 440 Hz (440 vibrations per second).
Strength or energy as an attribute of physical action or movement.
"Swallow". A verb that means to push food through your pharynx would be to "Swallow".
