I’m assuming D cuz it’s the 1800s
<span>The composition of the Earth and the processes that are changing it</span>
Answer: Europeans carried deadly (to the Native Americans) diseases
Explanation: When getting cured of a disease your body will have some type of immunity to the disease. If it is common from where you are then it wouldn't be too harmful. However, Native Americans getting new European diseases harmed them because this was new and they had no immunity. This made these diseases deadly to them.