Lava rock contain a fossil
There is no pigment in the brain, so it is in it's natural colour, grey.
There were several characteristics that the scientists kept in mind while classifying, these are mobility, cell structure, cell type, body type, etc.
<h3>What is classification?</h3>
Classification is the grouping of organisms based on similar characteristics which makes them different from other groups.
There are the following characteristics to classify them:
- Mobility: it includes whether the organism is moving or sessile.
- Cell type: it includes eukaryotic or prokaryotic cells.
- Cell structure: it includes whether the cells have a cell wall or not.
- Body type: it includes whether the organism is unicellular or multicellular.
- Mode of nutrition: It includes whether the organism is parasitic, autotrophic, symbiotic, consumer, etc.
Thus, these are the characteristics that the scientists kept in mind before drawing classification.
For more details regarding classification, visit:
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The answer is A. melting. The change from gas to liquid to solid will release energy and the change from solid to liquid to gas will absorb energy. So the other three are releasing energy.
