Answer:
The main idea of this paragrph is the concept of medium of exchange.
Explanation:
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A participle is a verbal ending in -ing(present)or -ed,-en, ,that functions as an adjective, modifying a noun or pronoun
That means that every letter with a line of symmetry like M wouldn't work: A, T, U, V, W, and Y. But you can use the letters B, C, D, E, H, I, K, O, and X. It doesn't sound like a name but it could be Obeidh, Ikechi, Hideki, Dockie, Bohdie, Bodhie, Bobbie (unless you can't use the same letter twice), Debbie ("), Becki, Bodhe, Chiko, Cobie, Dixie ("), Echoe ("), Eddie ("), Kobe, Khoi, Echo, Bobo, Hido, Hebe, Kebe, Cobi, Debb, Kiki, Beck, Ike, Koe, Ed,