The answer would be d because music doesn't necessarily require physical activity unless you are in the marching band. Hope this helped! :)<span />
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Pierre and Charles discovered the Time Capsule of their back-great-grandfather, buried hundred years ago.
They found a kind of paper there, representing continents. They discovered a message hidden behind the card, explaining that it represents the Earth of time.
They noticed a pad filled with pages with a rather intimate writing. There were relating messages every day from the author.
They found brilliant rings accompanied with stuck labels.
They were impressed by a rather heavy, big book filled with unknown information. They did not know numerous words which were registered.
They found old colored fabrics, able to be carried. They have deducted that from it was the clothes of the time. They found sober colored "clothes" for feet. They discovered pieces of circular metal that were varying in size and with various figures registered above.
They were intrigued by a white rectangle, with a long message which was intended for them.
Both boys are proud and happy to have found a track of their ancestor.
They perceived sorts of trays with pawns, which they put on compartments. There were sorts of small, rather compact, white rectangles with various sorts of colors and symbols.
Finally they recognized more or less a smartphone, but impossible to use for them. They were surprised all the same with the technological breakthrough of the time.
In a small letter, was how their back grandfather imagined the future.
"Later, I imagine flying cars."
Charles was answered, he was right they are of kind of flying car, but more resembling in a drone. It is true that robots are very present, but fortunately they do not make all. Our great-grandfather had a good imagination.
The effect best described is letting us see what the spectator sees
