Final answer:
The subsistence pattern of the Navajo has changed over the years as they adapted new techniques and materials. They transitioned from utilitarian textiles to highly regarded weavings in the market.
Step-by-step explanation:
The subsistence pattern of the Navajo has changed over the last 1000 years due to various factors. Originally, the Navajo relied on hunting, gathering, and agriculture to sustain themselves. They raised livestock such as sheep and harvested their wool, as well as grew cotton. They used an upright loom to weave cotton and wool fibbers into textiles. These textiles were utilitarian and traded with nearby tribes. However, over time, the Navajo adopted new techniques such as incorporating sheep wool into their weaving tradition and obtaining new materials through trade. Today, Navajo weaving is highly regarded and valued in the market.