If the full question is "who does a ventriloquist usually converse WITH," the answer would probably be "their puppet." for entertainment, ventriloquists usually manipulate a puppet's movements and their mouth to pretend that the character they create of the puppet is talking.
Sentences use semicolons in replace of a period. However semicolons cannot replace commas.
The sentence:
“He walked across the street quickly. He ran into a stop sign.”
Can be turned into:
“He walked across the street quickly; running into a stop sign.”
Answer:
by providing that marathon running is very strenuous
Explanation: