The best and most correct answer among the choices provided by the first question is the third choice or letter C "<span>Living things contain a vital force absent in nonliving things."
On the other hand, the </span>best and most correct answer among the choices provided by the second question is the first choice or letter A, the element oxygen was first discovered among all the choices.
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An approach that uses passive solar heating instead of electricity for businesses and homes is known as A. Daylighting.
<h3>What is daylighting?</h3>
This is the illumination of buildings with natural light through the practice of placing reflective surfaces so that sunlight can provide effective internal lighting.
Solar heating is the use of sunlight to heat water or air in the buildings using radiant light and heat which is harnessed using a range of technology such as solar power to generate electricity.
Hence, we can see that neither weatherizing, green roofing nor cool roofing is the answer because they do not deal with providing passive solar heating, but daylighting uses passive solar heating.
Therefore, the correct answer is option A.
Read more about<em> solar heating</em> here:
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Lactobacillus<span> is a genus of Gram-positive, facultative anaerobic or microaerophilic, rod-shaped, non-sporeforming bacteria. They are a major part of the lactic acid bacteria group (example: they convert sugars to lactic acid).</span>
