The passage is about researchers finding ‘rhyta-vessel’ as archaeological evidence of cattle being milked rather than eaten in Neolithic settlements. So, sentence 2 opens the passage. Sentence 1, next, states how they (the researchers) proved that these vessels were used to store cheese. Further, 3 compares storage capacity of cheese and milk. Next, 5 quotes the observation that milking animals meant a sustained source of food scores over killing them for meat; hence, archaeologists were compelled to invalidate their assumption that earliest domestication of animals was for meat.