Polyvinyl chloride, or pvc, is used in most water-carrying pipes in the united states. known for their resistance to the corrosion that can be caused by water, pvc pipes are more durable than the metal pipes of old. as useful as pvc is, it may be surprising that it was accidentally discovered in 1835 by henri victor regnault, who observed a mysterious white solid plastic forming inside some test tubes that were left exposed to sunlight in his lab. it can be inferred from the passage that metal pipes:
a. are used more than pvc pipes outside of the united states
b. are more expensive than pvc pipes
c. are more likely to corrode than pvc pipes
d. are no longer used in the united states

explanation:

communication is extremely important in any relationship. importance of communication has been stressed upon time and again. lack of communication creates a number of problems that only increase with time.

it is often seen that the families where people talk to each other frequently are happier. they share their joys, sorrows and other emotions with each other. there is a lively atmosphere in such families. they laugh it out together and celebrate every moment whole-hearted. they never feel lonely or bored. they know whenever they want to talk about something or share an emotion they always have an ear to listen to. such is the importance of communication.

compared to this, the families where all the members are engrossed in their own tasks and do not bother to care about or talk to people around them are usually not as happy. the atmosphere in such families is quite dull and gloomy. people are busy with their own tasks. they have friends outside and are not as close with their family members.

they plan outings with their friends and colleagues rather than their family members. this is because they have neglected the importance of communication all along and are thus not comfortable communicating with each other. and without good communication there is no way one can enjoy.

in this text, paine use the word “ye” several times in order to  capture  the  attention of the colonists who   haven't understand the   importance and urgency of his cause. the word "ye" that is the plural of   "thou" is used to call the colonists attention and make the fight for the cause.

a-he encouraged islamic schools to introduce greek texts.

d-he invited greek scholars to teach their texts to the locals.

explanation:

the transmission of the greek classics to latin western europe during the middle ages was a key factor in the development of intellectual life in western europe.[1] interest in greek texts and their availability was scarce in the latin west during the earlier middle ages, but as traffic to the east increased so did western scholarship.

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