Identify the causes and effects of farm and labor organization and unrest in the late 1800s

i think the answer is the one about environmental and social health.

hope this

answer: the time zones used to be whatever the local authority wanted them to be. one town might have 6am whenever the sun came up and another town had 6am 10 minutes later.  

the trains had a hard time when their orders said to be at a certain point at 6am.  

6am, but who's 6am.  

the railroads got together and set the time zones more or less along the longitude lines across the country.

explanation:

cause : british fleet attacks to resupply their troops the battle of yorktown malaria broke out among armies

description general george washington, commanding a force   french and continental troops,   battle of yorktown against british general lord charles

with the winner being george washington.