Answer:
Bacteria alike spores come in hand to hand; meaning one can cause the other if not treated properly and in time. Perhaps washing hands with soap for 20 seconds, when coughing cover cough into your elbow and avoid sneezing into the open air; use tissue to hold your sneeze.
In ecology<span>, a </span>niche<span> (</span>CanE<span>, </span><span><span>UK:</span> <span>/<span>ˈniːʃ</span>/</span></span><span> or </span><span><span>US:</span> <span>/<span>ˈnɪtʃ</span>/</span></span>)[1] is the fit of a species living under specific environmental conditions.
<span>https://en.wikipedia.org/wiki/Ecological_niche</span>
The answer is B, as for the flower to produce seeds, it needs to have been previously fecundated by a male gamete.
The organisms can obtain energy or reassemble the resulting materials to form different compounds.
hope this helps!