Final answer:
The llama and alpaca were important for the Inca civilization because alpacas provided soft wool for textiles and llamas were used as pack animals. They were also used for meat and their dung served as fuel.
Step-by-step explanation:
The llama and alpaca were important animals for the Inca civilization for several reasons. Firstly, alpacas provided soft wool that was sheared and used to make textiles such as blankets, ponchos, and hats. Secondly, llamas were used as pack animals to carry heavy loads over the difficult terrain of the mountains. They were able to carry up to 100 pounds of cargo. Lastly, both llamas and alpacas were used for their meat and their dried dung served as fuel in the high altitudes where wood was scarce.