<span>b. gravel on the bottom of the aquarium</span>
An ecosystem involves both the biological (plants, animals, human beings) and non-biological (land, water, soil, and atmosphere) community which interacts as a system. More importantly, the living things are very dependent on the abiotic community since it cannot survive by itself. Every animal, plant and human needs the primary physiological needs of water, food and shelter provided by the abiotic system. <span>
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Biotic factors:
Plants
Microorganisms
Macroorganisms
Answer:
the correct answer is d they scavenge at times as well as hunt a good example of this is the hyena
Explanation:
hope this helps
The answer or complement is D.unattractive
It is a true fact that over tillage harm the soil. Over tillage actually increases the intake water capacity of the soil. As the intake capacity of the soil increases, there is every chance that the soil will become compacted. This happens as the broken up elements of the soil start coming together and results in compaction.