If you wander around central park in new york city, you will eventually encounter random, large boulders that are made of a type of rock not found in the area. how did these large boulders get to central park?
a. the parks and recreation department placed them there for kids to play on.
b. they were carried by rivers and deposited in point bars.
c. they were carried by glaciers and dropped to form glacial erratics.
d. they were placed there by a giant tsunami millions of years ago.

C. They were carried by glaciers and dropped to form glacial erratic.

Explanation:

i would expect light rain in pittsburgh throughout the following 24 to 48 hours. the lower/falling weights in urban areas toward the west demonstrate that a low weight framework is moving from west to east toward pittsburgh. low weight frameworks are ordinarily connected with precipitation. the way that you don't see a major drop in temperature in the more western urban areas demonstrates the low weight framework is moving with a warm front, so just light rain would be normal. substantial downpours or progressively vicious climate is just typically connected with chilly fronts, where the warm air is pushed up and over a cool front quickly. this quickly rising air (convection) is what gives you heavier torrential downpours, and other conceivably serious weather conditions.

this is a good question! i'll do some research and come back when i have the answer!