Final answer:
The historical policies which suppressed Indigenous culture are Assimilation, where Indigenous peoples were forced to adopt the colonizing culture, and Protection, which also suppressed Indigenous culture by confining populations to reserves or missions.
Step-by-step explanation:
The two historical policies which suppressed Indigenous culture are b) Assimilation and Protection. Assimilation was a policy through which Indigenous peoples were forced to abandon their own cultures, languages, and lifestyles in favor of the colonizing culture. This often involved sending Indigenous children to boarding schools where they were not allowed to speak their native languages or practice their cultural traditions. The policy of Protection was ostensibly aimed at sheltering Indigenous people from the impacts of colonization, but in practice, it also led to the suppression of Indigenous cultures as it involved placing Indigenous populations on reserves or missions where they were often prohibited from practicing their traditional ways of life. Both policies had the effect of eroding Indigenous cultures and identities.