It illustrates the cycling of matter, just like in a natural ecosystem.
Option D.
<h3><u>Explanation:</u></h3>
The natural stable ecosystem is defined as the ecosystem which has the members doing their part of job and each and every member contribute to the stability of the ecosystem by completing food chains.
Here in this bottle ecosystem the boy put the stones, rocks, water which gives proper nutrition to the growing plants and animals which are also introduced by the boy. The plants produce oxygen and consume carbon dioxide whereas the animals consume oxygen and produce carbon dioxide. Thus the cycle is maintained and stability is achieved.
In the early 19th century capturing merchant ships as prizes of war was the primary purpose of Privateers navy vessels.
<h3>What is
Privateers navy vessels?</h3>
Privateers are furnished vessels that are possessed, prepared and officered by at least one confidential people, however cruising under a commission, as a rule called letters of marque, from a combative state, which engages the individual or people to whom it is conceded to assault and seize, adrift, vessels or other property of its foe. East Indiaman Kent (left) fighting Confiance, a privateer vessel told by French corsair Robert Surcouf in October 1800, as portrayed in a composition by Ambroise Louis Granera. A privateer is a confidential individual or boat that takes part in oceanic fighting under a commission of war.
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the answer is pioneer species
<span>A low level of TSH is indicative of hyperthyroidism. This is a medical condition in which the thyroid gland secrets or produces an excess of hormones resulting in an imbalance. This condition if left untreated can cause many undesirable effects such as muscle weakness, low quality of sleep etc.</span>
