The plant produces oxygen which the animals need (may also be food source), and the animals produce waste products and carbon dioxide which the plants need, so theoratically the system can be left on its own without external support(self sustaining).
No sugar isn’t a ionic compound
All of these elements have an electron configuration<span> that ends with </span><span>s1</span><span>. Francium's properties have not been determined experimentally, because so far there has not been enough of it to experiment with </span>Sodium is group 1/IA, the alkali metals, on the periodic table. Therefore, the other elements in this group will have similar properties as sodium. These would include, lithium<span>, potassium, </span>rubidium<span>, and </span>cesium<span>.
Hope this is the answer
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