Answer:
the correct answer would be D or if not then B
Explanation:
For instance, light stimulation, heat stimulation, chemical stimulation, sound stimulation, etc. -The stimulus that comes from within an organism is the internal stimulus. Humor stimuli and neural stimuli etc (release of hormones such as thyroxine).
That 123456789010qwertyuiopasdfgghjklzxcvbnm have a nice day says my keyboard
An acid because if its less than 5 its an acid
High efficiency particulate arrestor is a type of air filter that can theoretically remove at least 99.97% of dust, pollen, mold, bacteria, and any airborne particles with a size of 0.3 microns. The HEPA filter does not remove vapors or gases.
HEPA air purifiers have some level of activated carbon-based material to absorb odors and chemicals .HEPA filters claim to remove particles like dust, allergens and mold spores from the air. HEPA filters are made by haphazardly arranging the polypropylene or fiberglass fibers (between 0.5 and 2.0 µm). While sometimes the fibers are arranged in a mess, the fibers can pass air through and trap some of the particles.
To learn more about High efficiency particulate arrestor ,here
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