Read this excerpt from "How the Internet and Other Technologies Came About."

The Pentagon wanted to ensure that their pilots would be able to fly their jets and bombers in the most unpredictable, hostile environments, including the presence of huge winds whipped up by nuclear fireballs. To accomplish this, the Pentagon developed flight simulators, in what was the birth of virtual reality. The pilots would sit in chairs with goggles placed over their eyes and use joysticks to control the simulated computer image in their headset.

Select the most accurate summary of Kaku’s argument.
Virtual reality allows people to experience harsh environments, such as nuclear warfare, in a safe location.
Virtual reality began as a Pentagon-generated tool that prepared jet pilots for nuclear war.
Virtual reality has impressive gadgetry, such as joysticks and headsets, that were inspired by the Pentagon.
Virtual reality is an indispensable tool that prepares pilots for the shock of nuclear fireballs.

the unsaturated fatty acid is a fat consist of one or more double bond in the fatty acid chain. if it contains one double bond then called as monounsaturated fatty acid however if, it contains more than one bonds called as a polyunsaturated fatty acid. true fatty acids are called unsaturated fatty acids as it reduces the risk of high blood cholesterol and good for health.

wordsworth tends to see nature as 'out there'; a presence which surrounds humans, and contributes to human life, but is different from humans. if you look at a typical wordsworth poem (there was a boy, ye knew him well ye rocks) - wordsworth talks about nature as something that needs to be learned about and understood, nature is different from us.  

if you look at a byron poem (the isles of greece is a good one) - byron looks at nature mainly for what it already means to man. wordsworth will look at a landscape and see the mountains, trees, valleys, and rivers as almost spiritual presences - wordsworth wants to get to know nature.  

byron will look at the same landscape and he will want to know who lives there, what are the villages? are there any farms or mines, is there some history?  

wordsworth looks at nature for what it is; byron is forever asking what it means.  

wordsworth thinks that humans are part of nature; byron thinks that nature is part of being human