Periodically throughout recorded history, puzzling instances of psychiatric and neurologic symptoms have presented en mass<span>: outbursts of thrashing and screaming, or je rky spasms and abrupt vocal tics affecting a group of individuals at once and often attributed to causes like possession, witchcraft, and malingering. Such occurrences of so-called "mass hysteria" continue to confound the medical community, but growing experience has improved the understanding and approach to these seemingly contagious psychogenic events. </span>
AT THE BEGINNING HE SEAMS ANGRY AND UPSET BUT IN THE END HIS WHOLE MOOD CHANGES
Answer:
There are two ways which we can use to change the sentence from affirmative to negative:
1. Not only the industrious prosper in life.
2. Only the industrious do not prosper in life.
Explanation:
1. If we choose to make the negative this way, the meaning we will convey is that industrious people prosper, but they are not the only ones. Other people can prosper too.
2. On the other hand, if we negate this way, we will completely deny the original affirmation. We will be saying that everyone else prospers in life excerpt for industrious people.
Both ways are grammatically correct, even though they convey different meanings.
The study of the structure an behaviour of the physical and natural environment by oberseving through scientficic instruments and through experiments.
D. "this was an uneasy secret..."
