What historical conclusion comes from repeated pastoral routes?

Correct answer: Their movement was based on collective memory and environmental knowledge.

Repeated pastoral routes reveal a planned and learned response to the environment rather than random movement. Pastoralists remembered where seasonal grass, water, shelter and safe passages could be found, and this knowledge was shared within families and communities. Returning along familiar routes also reflected collective memory built through repeated experience. Option B is therefore correct: movement depended on accumulated environmental knowledge and social transmission. Option A contradicts the evidence, option C wrongly treats migration as accidental, and option D ignores the central connection between routes, grazing resources and animal survival.