Answer;
-Pure chemical substance and element
Explanation;
-Pure substances are substances that are made of only one type of atom or molecule.A pure substance can be either an element or a compound, but the composition of a pure substance doesn’t vary.
-An element is a pure substance that cannot be broken down into different types of substances by chemical means. All elements are pure substances. An element is composed of a single kind of atom. An atom is the smallest particle of an element that still has all the properties of the element.
-Tungsten is an element and therefore a pure substance.

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The answer to this will be is : </h3><h2 /><h2>
C. Plant roots grow into a crack in a rock.</h2><h2 /><h2>

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Because "mechanical weathering" It's a example of the Plants roots that grow on into a crack in the rock.
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Answer:
carnivores eat meat and herbivorres eat plant
Explanation:
A nurse suspects that the IV line through which Doxorubicin (adriamycin) is infusing has infiltrated. The nurse has discontinued the IV site.
The nurse should IMMEDIATELY APPLY ICE PACK TO THAT AREA. Ice pack helps to reduce the absorption of the drug doxorubicin and thus minimize the its effect.