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1. Filters can help enhance a photograph and make the scene look better . You can use a filter to change the way the camera captures the image or how the light is effective .

2. A polarizing filter is a filter that improves saturation in the photograph and also reduces amount of reflected light that hits the camera . This makes the colors much deeper .

by 1890, the united states had by far the world's most productive economy. american industry produced twice as much as its closest competitor--britain. but the united states was not a great military or diplomatic power. its army numbered less than 30,000 troops, and its navy had only about 10,000 seamen. britain's army was five times the size of its american counterpart, and its navy was ten times bigger. the united states' military was small because the country was situated between two large oceans and was surrounded by weak or friendly nations. it faced no serious military threats and had little interest in asserting military power overseas.

they united the colonies in their fight against the british.