Reading comprehension worksheet featuring three informational passages on the piano, Irish immigration, and water conservation, with spaces for students to write the main idea of each.

Final Answer:
1. The piano is classified both as a string instrument (because sound comes from vibrating strings) and as a percussion instrument (because the player strikes keys that trigger hammers to hit the strings).
2. Irish immigration to the U.S. began in the early colonial period, increased sharply during the 1845–1852 potato famine, and continued into the late 19th and 20th centuries; today, over 36 million Americans have some Irish ancestry.
3. Simple water-saving habits—like turning off the faucet while brushing teeth, fixing drips, taking baths instead of showers, and running full dishwashers—can significantly reduce household water use and save money.