Magnetism is a physical property that can be used to separate a mixture of

Magnetism is a physical property that can be used to separate a mixture of__solid mixture with at least one part having magnetic property

Explanation:

Example of such as a mixture is that of plastic with metals like iron or nickel or cobalt. Passing the mixture through a giant magnet separates the metals from the plastic. This is especially useful in the recycling of waste. The metals – with magnetic properties- can be separated from other materials and reused.

b) mutualism

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the answers would be

the first one and the second one