Final answer:
The larger allotments were given to heads of households in order to promote individual land ownership and assimilate Native Americans into American society.
Step-by-step explanation:
The larger allotments were given to heads of households under the Dawes Act of 1887 in order to promote individual land ownership. The goal of the act was to assimilate Native Americans into American society by encouraging them to adopt Western farming practices and become self-sufficient. By giving larger allotments to heads of households, the government hoped to create individual farmers who would be more likely to succeed on their own.
Learn more about Dawes Act of 1887