The punctuation mark that is not used internally in a sentence is a period (.). Periods are only used when ending a sentence therefore, it should only put at the end. Periods signal that the sentence has already ended and no continuation needed.
I believe the answer is conflict. I hope this helps!:)
Answer: The compression pulse which is produced when the hammer hits the metal bounces backwards and forwards within the metal. Most of the pulse (sound wave) is reflected within the metal rather than transmitted outside the metal into the air because the speed of sound in a metal is much bigger than the speed of sound in air.
Explanation: Brainelist Me
<span>heading. includes the address and the date.greeting. usually starts with 'Dear' and is followed by the person's name. body. the body or main text of your letter. closing. a short, capitalized expression followed by a comma.signature. sign your name directly below the closing.<span>postscript. P.S add a note.</span></span>
