Question

how did the spread of diseases like smallpox affect indigenous resistance to european conquest?
it strengthened indigenous societies by creating stronger immune systems.
it weakened their populations, making it easier for europeans to conquer them.
it had no significant impact on indigenous resistance.
it caused european settlers to retreat from indigenous lands.

Explanation:

Smallpox, a disease brought by Europeans to the Americas, was new to Indigenous populations who had no prior immunity. This led to widespread illness and death, drastically reducing their numbers and weakening their ability to resist European conquest. The other options are incorrect: smallpox did not strengthen Indigenous immune systems (they had no prior exposure to build immunity), it had a massive impact on resistance (not "no significant impact"), and it did not cause Europeans to retreat (Europeans were the ones spreading the disease and conquering).

Answer:

It weakened their populations, making it easier for Europeans to conquer them.