Answer:
A consumer or a heterotroph.
Explanation: Organisms are characterized into two broad categories based upon how they obtain their energy and nutrients: autotrophs and heterotrophs. A heterotroph (consumer) is an organism that eats other plants or animals for energy and nutrients. An autotroph is an organism that can produce its own food using light, water, carbon dioxide, or other chemicals
As the substance melts the particles have a higher chance of colliding with one another and also move much faster than when the substance is solid. This is because the particles have a higher surface area to move around. Also the arrangements of particles are free.
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