Please find the answers in attached file.
Fist one correct.
second wrong because not all heat is used for work, some of it lost to other.
third wrong because fuel burn inside is called combustion engine
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TrueBones do not change position
> News sites give information about news or what is trending around the area or world (CNN, Fox, MSNBC, etc)
> Search engines is what allows you to look up websites (Google, Bing, Yahoo, etc)
> Social media AKA Social Networking sites is interaction social sites where you connect with various people from around the world. (Facebook, Twitter, Google+, etc)
>Apps is short for applications which is an application that has a specific function (Games, Music, Social networking)
So based on this, you answer is C. Social Media
