Final answer:
The kinetic-molecular theory explains that an increase in temperature leads to an increase in volume due to the increase in kinetic energy of particles.
Step-by-step explanation:
The relationship between temperature and volume, as explained by the kinetic-molecular theory, is that as temperature increases, so does the kinetic energy of the particles. This increase in kinetic energy causes the particles to move faster and spread out, leading to an increase in volume.
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