QUES: Examples are 河 hé "river", 湖 hú "lake", 流 liú "stream", 沖 chōng "riptide" (or "flush"), 滑 huá "slippery". All these characters have on the left a radical of three short strokes (氵), which is a reduced form of the character 水 shuǐ meaning "water", indicating that the character has a semantic connection with water. The right-hand side in each case is a phonetic indicator. For example, in the case of 沖 chōng (Old Chinese *ɡ-ljuŋ), the phonetic indicator is 中 zhōng (Old Chinese *k-ljuŋ), which by itself means "middle". In this case it can be seen that the pronunciation of the character is slightly different from that of its phonetic indicator; the process of historical phonetic change means that the composition of such characters can sometimes seem arbitrary today.

What process can sometimes seem arbitrary today?
What is the answer?
ANS: phonetic change
QUES: The Elizabethan navigator, Sir Francis Drake was born in the nearby town of Tavistock and was the mayor of Plymouth. He was the first Englishman to circumnavigate the world and was known by the Spanish as El Draco meaning "The Dragon" after he raided many of their ships. He died of dysentery in 1596 off the coast of Puerto Rico. In 2002 a mission to recover his body and bring it to Plymouth was allowed by the Ministry of Defence. His cousin and contemporary John Hawkins was a Plymouth man. Painter Sir Joshua Reynolds, founder and first president of the Royal Academy was born and educated in nearby Plympton, now part of Plymouth. William Cookworthy born in Kingsbridge set up his successful porcelain business in the city and was a close friend of John Smeaton designer of the Eddystone Lighthouse. On 26 January 1786, Benjamin Robert Haydon, an English painter who specialised in grand historical pictures, was born here. The naturalist Dr William Elford Leach FRS, who did much to pave the way in Britain for Charles Darwin, was born at Hoe Gate in 1791.

What notable artist and Royal Academician was born in Plympton?
What is the answer?
ANS: Sir Joshua Reynolds
QUES: The Water, Sanitation and Hygiene (WSH) program of the Gates Foundation was launched in mid-2005 as a "Learning Initiative," and became a full-fledged program under the Global Development Division in early 2010. The Foundation has since 2005 undertaken a wide range of efforts in the WASH sector involving research, experimentation, reflection, advocacy, and field implementation. In 2009, the Foundation decided to refocus its WASH effort mainly on sustainable sanitation services for the poor, using non-piped sanitation services (i.e. without the use of sewers), and less on water supply. This was because the sanitation sector was generally receiving less attention from other donors and from governments, and because the Foundation believed it had the potential to make a real difference through strategic investments.

What efforts have the WSH taken 
What is the answer?
ANS:
since 2005 undertaken a wide range of efforts in the WASH sector involving research, experimentation, reflection, advocacy, and field implementation