<span>According to endosymbiosis theory, host archaea engulfed aerobic bacteria, which then allowed both populations to survive together. Aerobic Bacteria grow in the presence of oxygen to oxidize glucose where water is produced. They are the largest and most common cause of clinical infections, such as tuberculosis. In contrast, anaerobic bacteria/organisms do not require oxygen for growth and may, in fact, die as a result of too much oxygen. </span>
Hydrogen,oxygen,nitrogen and carbon. Some might also contain a fifth element, sulfur. (Hope this helped!)
I would have to say A. A plant wants its seeds to be spread out so more plants can grow. Getting stuck to animal fur helps that, unlike C. If the animal ate the seed, that would be no help to the plant that wants its seeds to grow. That eliminates C + D. B would work, but your question asks about animals, not insects. So, A is the only plausible answer. Hope this helps!
Boron<span> (B), G</span>allium<span> (</span>Ga<span>), I</span>ndium<span> (In), T</span>hallium(Tl<span>)</span>