<span>An encyclopedia entry is an example of a tertiary source. Unlike primary sources, which contain original thought and research, and secondary sources, built on a writer's or editor's interpretation of information in primary sources, encyclopedia entries are reports about a subject that can include information from both primary and secondary sources.</span>
Answer:
D. presidential democracy
Explanation:
I believe the answer is: cancer
According to research, about 60% of people who developed cancer got in when they hit the age of 60 or above.
The destruction of cells that happen in older people's body happen on a much higher rate compared to younger people but the regeneration is much slower. This plays a role in speeding up the growth of cancer.
The cataracts kept lower Egypt from coming up the Nile to trade. It made trade decline between the two.