NACL is the correct answer
Con·cen·tra·tion
/ˌkänsənˈtrāSH(ə)n/
Learn to pronounce
noun
1.
the action or power of focusing one's attention or mental effort.
"frowning in concentration"
where it breaks down complex molecules into much easy ones
<span>The option which is not a type of synovial joint in the human body is B. stirrup. All of the other choices, pivot, hinge, and gliding, are types of synovial joints, whereas a stirrup is not. A synovial joint allows for movement, whereas a stirrup is a bone in your ear that brings vibrations into the inner ear. So obviously, it has nothing to do with joints or movement. </span>
A train traveling at 50 miles per hour will have more kinetic energy than a bicycle traveling at 15 miles per hour
