Which two cause-and-effect relationships are based on facts and could be proven?

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.

What actions did americans take to show their patriotism after peal harbor

One day as your professor is driving to work, another driver runs through a red light and hits his car. the professor is shaken up but survives the accident. however, the next time he starts to enter the intersection,he becomes nervous and fearful. soon,he starts going to work via another route to avoid the intersection even though this route adds twenty minutes to his commute in each direction. according to the principles of classical conditioning, why does the professor become scared of the previously harmless intersection? what can he do about this, as going via other route is very time consuming? be specific. break down the situation into its parts and show how the principles of learning apply.

In the course of illness senerational campaign against stephen douglas in1858 abraham declared that