Technologies that allow for instant worldwide communication include

high-speed trains and naval ships.
mobile phones and internet access.
airplanes and container shipping.
outsourcing and new trade markets.

The answer is: mobile phones and Internet access.

Explanation:

Mass communication, or mass media, as well as private communication have changed dramatically since the appearence of the Internet. Before the massification of the Internet, mass media relied on devices such as television and radio, but communication wasn´t instant.

Thanks to Internet and to devices that have Internet access, such as mobile phones, communication is now instant and a person can see information from the other part of the world at almost the same time an event is happening.

mobile phones and internet access

as university of miami psychologists debra lieberman and adam smith pointed out in a recent article in the journal current directions in psychological science, humans have social and psychological mechanisms to deter incest. with very few exceptions, marriages between brothers and sisters and between parents and their children are verboten in every human culture. the primary psychological anti-incest mechanism is the yuck response. even the idea of sex with their mom or dad, bro or sis is upsetting to most people. the psychologist jonathan haidt has found that nearly everyone is repelled by the prospect of brother-sister sex, even in hypothetical situations in which there is no chance of pregnancy).

the biological cost of incest

this raises an interesting question: just what’s so bad about incest? sure, having sex with your dad or your sister seems gross — but why? some anthropologists have argued that incest taboos are learned social conventions. this explanation, however, doesn’t make sense to me as it does not explain the widespread existence of anti-incest mechanisms in creatures ranging from cockroaches to chimpanzees. second, the incest taboo is about as close to a universal law as human moral rules get.

why should mechanisms to avoid incest be so widespread both in nature and across human societies? the answer is simple. the problem with having sex close with relatives is that there is an astonishingly high chance that your offspring will be born with a serious birth defect.

answer; severe;