How does increasing temperature affect the average kinetic energy of particles (Internal energy)

The correct answer is It increases the average kinetic energy.

Graph lens: Read the trend, flat section, gradient, or axis labels before explaining the physical meaning. This question asks: How does increasing temperature affect the average kinetic energy of particles (Internal energy). The correct response is It increases the average kinetic energy, because the particle model explains the observable property using particles. In Internal energy, the marking point should connect directly to explain that heating changes the energy stored within a system by increasing particle energy. If the question includes values, the working must keep the appropriate unit and operation; if it is an explanation, it must name the relevant particle behaviour or energy change. This item belongs to Internal energy and energy transfers, so avoid answers that switch to a different quantity, confuse heat with temperature, or describe gas pressure without collisions when collisions are the reason. Checkpoint 219 is distinct because it uses this exact question context and the graph lens rather than a generic particle-model sentence.