Final answer:
Chondrites are the type of meteorites that come from undifferentiated bodies and provide insights into the early solar system. Other meteorite types, like irons and stony-irons, originate from differentiated parent bodies that underwent internal melting and chemical segregation.
Step-by-step explanation:
Regarding the question of which type of meteorites comes from undifferentiated bodies, the answer is chondrites. Meteorites are classified as irons, stones, and stony-irons. Among these, the primitive meteorites, such as chondrites, are especially important for studying the early history of the solar system since they are made of materials that have not been subjected to great heat or pressure since their formation and thus represent the composition of their parent bodies well. In contrast, differentiated meteorites—irons and stony-irons—come from larger parent bodies that have undergone chemical segregation due to internal melting, leading to materials of different densities settling into separate layers (the core, mantle, and crust).
The primitive meteorites have compositions that link them to certain asteroids, believed to be leftovers from the formation of the solar system, making them good candidates as the parent bodies of these meteorites. Because of their undisturbed nature, chondrites are the remnants of the original building material of the solar system and have not been differentiated like the meteorites that originated from molten parent bodies.