Final answer:
The indigenous peoples in California did engage in some agriculture, such as the cultivation of tobacco, and practiced environmental control, making the statement false.
Step-by-step explanation:
The assertion that the indigenous peoples in California prior to contact did not engage in agriculture or environmental control is false. While they were primarily hunter/gatherers, they did engage in some form of agriculture. For instance, many groups cultivated tobacco as their sole agricultural crop. Moreover, the Miwok people of California practiced forms of environmental control such as burning, pruning, and selectively harvesting to manage the Yosemite landscapes. Thus, indigenous peoples had an understanding of and actively participated in manipulating their environment.