Which two cause-and-effect relationships are based on
facts and could be proven?
Most doctors had predicted the fever would end when
the cold weather returned. Almost all epidemics followed
the same pattern, striking during warm weather,
disappearing with the first hard frost. Daniel Defoe, in
recording the end of the Black Death that visited London
in 1665, wrote that "the winter weather came on apace
[and] most of those that had fallen sick recovered."
-An American Plague,
Jim Murphy
Yellow fever would end with cold weather.
Diseases always spread faster in the summer.
Yellow fever would continue throughout the winter
months.
The Black Death decreased during the winter.
People are always healthier in the winter.

Yellow fever would end with cold weather and The Black Death decreased during the winter

Explanation:

at nineteen years old, nicole c. kear's biggest concern is choosing a major--until she walks into a doctor's office in midtown manhattan and gets a life-changing diagnosis. she is going blind, courtesy of an eye disease called retinitis pigmentosa, and has only a decade or so before lights out. instead of making preparations as the doctor suggests, kear decides to carpe diem and make the most of the vision she has left. she joins circus school, tears through boyfriends, travels the world, and through all these hi-jinks, she keeps her vision loss a secret.

when kear becomes a mother, just a few years shy of her vision's expiration date, she amends her carpe diem strategy, giving up recklessness in order to relish every moment with her kids. her secret, though, is harder to surrender - and as her vision deteriorates, harder to keep hidden. as her world grows blurred, one thing becomes clear: no matter how hard she fights, she won't win the battle against blindness. but if she comes clean with her secret, and comes to terms with the loss, she can still win her happy ending

googles summry you can summarize this in your own words