A mixture can be separated by looking at the physical properties of the components of the mixture.
Since salt is soluble in water, it can be added to the mixture to dissolve the salt.
The bar magnet is now introduced in order to remove the iron filings since they are attracted by a magnet.
The solution is filtered to separate the sand from the salt solution.
Lastly, the salt solution is heated to dryness to drive away the water and obtain the solid salt.
Hence the mixture has been separated into its components using their individual physical properties. Option A is the correct answer.
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Answer:
Healthy ecosystems have an energy source which comes from the sun
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