Final answer:
Pastoralists, such as cattle herders, have knowledge about plants that can help improve cattle's milk production. They understand the impact of climate change on milk production and the need for sustainable livestock management.
Step-by-step explanation:
Pastoralists, such as cattle herders, do have ideas about what plants help cattle's milk production. They have developed a vast store of knowledge about animals and the environment, including the vegetation and water sources necessary for their herds. They also know about medicinal and edible plants that can enhance milk production. For example, in northern Tanzania, pastoralists are aware that climate change affects their herds' milk production, and they attribute it to factors like population growth and deforestation. Therefore, they understand the importance of ensuring their livestock is raised well and sustainably.