According to the Scientific Method, in order to make a controlled experiment you NEED to have an hypothesis.
A controlled experiment consists of a test done by a scientist in which only one or a few variables are changed while the others remain constant in order to prove or disprove a hypothesis. This hypothesis is key to said experiment because it provides the starting point from which the professional can begin the procedure, as it helps focus on the subject that one is trying to get results from. Without a clear hypothesis, the outcome of the experimentation will not be valid nor specific.
The main character in the post-apocalyptic world of Ray Bradbury's 'There Will Come Soft Rains' is a house. Humans are extinct, apparently as a result of a nuclear bomb. Bradbury uses personification, or the imposition of human characteristics on inanimate objects, to bring the house to life.
The correct option is A.
In the passage given above, it can be seen that Dallow as the defence lawyer of these boys exaggerated and blamed all the circumstances surrounding the boys for their crime in order to manipulate the audience to believe that the situations surrounding them is the reason they behaved the way they did, otherwise they are normal children
Yes, it is true that -ing and un- have grammatical meaning.
Hope this helps! :)