Q: Given the following passage "Plants uptake essential elements from the soil through their roots and from the air (consisting of mainly nitrogen and oxygen) through their leaves. Green plants obtain their carbohydrate supply from the carbon dioxide in the air by the process of photosynthesis. Carbon and oxygen are absorbed from the air, while other nutrients are absorbed from the soil. Nutrient uptake in the soil is achieved by cation exchange, wherein root hairs pump hydrogen ions (H+) into the soil through proton pumps. These hydrogen ions displace cations attached to negatively charged soil particles so that the cations are available for uptake by the root. In the leaves, stomata open to take in carbon dioxide and expel oxygen. The carbon dioxide molecules are used as the carbon source in photosynthesis.", answer the following question. Note that the answer is present within the text. Question: What are cations?
A: nutrients

Q: Given the following passage "The Monument in the City of London provides views of the surrounding area while commemorating the Great Fire of London, which originated nearby. Marble Arch and Wellington Arch, at the north and south ends of Park Lane respectively, have royal connections, as do the Albert Memorial and Royal Albert Hall in Kensington. Nelson's Column is a nationally recognised monument in Trafalgar Square, one of the focal points of central London. Older buildings are mainly brick built, most commonly the yellow London stock brick or a warm orange-red variety, often decorated with carvings and white plaster mouldings.", answer the following question. Note that the answer is present within the text. Question: What would a historical building likely been composed of specifically?
A: yellow London stock brick or a warm orange-red variety

Q: Given the following passage "In 1989, CBS Records re-entered the music publishing business by acquiring Nashville music publisher Tree International Publishing for more than $30 million.", answer the following question. Note that the answer is present within the text. Question: A general name for a company that prepares and issues books, journals, music, or other works for sale.
A: publisher

Q: Given the following passage "Apple's iTunes software (and other alternative software) can be used to transfer music, photos, videos, games, contact information, e-mail settings, Web bookmarks, and calendars, to the devices supporting these features from computers using certain versions of Apple Macintosh and Microsoft Windows operating systems.", answer the following question. Note that the answer is present within the text. Question: What would you need if you wanted to use iTunes software and its features?
A:
computers using certain versions of Apple Macintosh and Microsoft Windows operating systems