If you stumbled upon a black hole and found yourself falling feet-first toward its center, then as you got closer, the black hole’s force of gravity would grow astronomically. curiously, you would not feel this force at all because, like anything in free fall, you are weightless. what you do feel, however, is something far more sinister. while you fall, the black hole’s force of gravity at your two feet, they being closer to the black hole’s center, accelerates them faster than does the weaker force of gravity at your head. the difference between the two is known officially as the tidal force, which grows precipitously as you draw nearer to the black hole’s center. for earth, and for most cosmic places, the tidal force across the length of your body is minuscule and goes unnoticed. but in your feet-first fall toward a black hole the tidal forces are all you notice.
which sentence from the excerpt best supports the idea that falling into a black hole would be excruciatingly painful?
a. curiously, you would not feel this force at all because, like anything in free fall, you are weightless.
b. what you do feel, however, is something far more sinister.
c. for earth, and for most cosmic places, the tidal force across the length of your body is minuscule and goes unnoticed.
d. but in your feet-first fall toward a black hole the tidal forces are all you notice.

given the fact that the question is about the detail that best support the idea that oppressive leaders use   propaganda to achieve thir goals,   the first option does not refer to any kind of propaganda, since it only tells about that the milk and the windfall apple should be reserved for the pigs. in the second option, that is, "snowball and napoleon sent out flights of pigeons whose instructions were to mingle with the animals on the neighbouring farms, tell them the story of the rebellion, and teach them the tune of "beasts of england". it can be identified that the oppressors make use of the propaganda, which is represented by the pigeons, and the information they have to tell other animals about what was happening in the farm in order to get their objectives. for that reason, the right answer is the second option, taking into account that the third option do not refer to propaganda since it only talks about that they did not want jones back. and, finally, the last option refers to the result of the given news, but it does not mean about the propaganda they used to achieve their goals.

a. "to practice" is the best phrase to complete the sentence.

explanation:

during the summer, she likes to practice her soccer skills so that she is ready to play in the fall.

(note that : all the other options "the practicing of", "practice for" and "to do a practice on" are inappropriate as they make the sentence grammatically incorrect.)