When the Earth cooled from being hot, all the iron and nickel was concentrated inside the Earth forming the inner two layers, inner solid core and outer liquid core. Then with the passage of time the Earth solidified gradually and the mantle solidified and now at this stage the Earth's crust, the outer most part of the Earth, looks like it's final product (the way it does now).
A paradox is a figure of speech that uses two contradictory statements or ideas which seems senseless, but when studied or investigated, it appears to have something in it that conveys a truth. The example of paradox among the sentences above is, you have to be cruel to be kind. The correct answer is option B.
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I'm not too sure what the Johari Window is, but I'm going to guess it's D, because she's doesn't know, so it's unknown to her. Sorry if that's wrong
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Robots are often portrayed in media to be evil and want to end all of humanity. That is not the case. That scenario is more fiction than true, and even then, robots have assisted humanity in things we never could have done without them. Robots assist us with dangerous tasks such as welding metals, which can easily cause injuries to humans. Robots can also go into areas that humans cannot easily go to, such as space. Along with that, humans now have assistance with doing every day tasks with robots, such as helping them walk around and help them move their body. Despite all that the media and science fiction says about robots, they assist us in many ways, and we wouldn't be where we are today without them.
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