Answer:
b: time
Explanation:
When meteorologists need to make a forecast they analyze different measurements in order to accurately make a forecast, these include patterns of winds, pressure, pressure change, temperature, humidity, clouds, and hygrometers. From the answers provided the one measurement that is not used is time. Mainly due to the fact that weather does not depend on the time of day, and any type of weather can be present at any time if the right circumstances exist.
Weathering and erosion played a big role in forming the grand canyon. The rock was being weathered, most likely mechanical weathering, and then it eroded away. Think of a pebble that is in running water. When you pick it up, it is smooth, right. But before, it was pointy. So, the grand canyon was once a big rock, and weathering broke through it making it one of the wonders of the USA.
The US Environmental Protection Energy or EPA is responsible for ensuring the country's drinking water to be safe and with good quality. It is in the Safe Drinking Water Act of 1974 that reclaims in ensuring the purity of drinking water Americans drink. Under the said Act, every citizen has his/her own roles and responsibilities. However, the implementation of such is governed by the EPA.
