To determine which choice best identifies the diagram, we would need to consider what the characteristics of each model are:
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Geocentric model of solar system: This model places the Earth at the center, with all other celestial bodies (including the sun) orbiting around it.
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Heliocentric model of solar system: This model places the Sun at the center of the solar system, with the planets (including Earth) orbiting around it.
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Modern model of solar system: This model also recognizes the Sun as the center, but includes the current understanding of planetary orbits, gravitational interactions, and the overall structure of the solar system including the existence of other celestial bodies like asteroids and comets.
Without seeing the actual diagram, if it primarily shows the Sun at the center with planets orbiting it, it would best identify the heliocentric model of solar system. However, if it shows Earth at the center with other celestial bodies revolving around it, it would be the geocentric model of solar system.
If the diagram includes more detailed aspects of the solar system as understood today, then it would be the modern model of solar system.
Therefore, if you could provide more context or describe the diagram, I could help determine the correct answer.