Writing Feedback /
TOEFL: If you could invent sth new, what product would you develop? [3]
You have chosen an interesting and imaginative invention to use as the focus of your essay. However, you need to clarity your explanation a bit for the essay to be truly effective. You should also revise throughout for diction.
For instance, you wrote: "Many companies nowadys poster million dollar rewards for alternative effective energy sources. however i will resist the temptation because mine device in the long term will dissolve this issue." First, the correct word here is "resolve" rather than "dissolve." Second, nothing in your essay supports the conclusion that your invention will resolve the need for alternative fuel sources. In fact, you don't mention alternative fuel sources again in the entire essay.
"find refuge to" should be "find refuge in."
"imaginary." That's the wrong word here. The person will presumably seek actual revenge for imaginary wrongs. Specifically, he or she will presumably seek revenge for wrongs that are rooted in the gap between the way things are and the way the person incorrectly imagines them to be.
"afford" isn't the right word here. You can either go with "we can't afford to be unconscious" or "it doesn't benefit us to be unconscious."
After this point, your essay consists of a very general description of what your device will do. I would rewrite the second half to consist of more specific examples of how it would work. So, instead of talking about emotions, talk about anger, hate, love, or some specific emotion. Instead of talking only about external or internal stimuli, give examples of specific stimuli, and so on.