The answer is A, friction.
Friction is the force that resists movement, and that's why oil is used as a lubricant and why ball bearings are used for machines that need to move with very little friction(i.e. bike wheels, roller skates, fidget spinners)
Answer B is too vague
C will probably reduce efficiency greatly, but not specifically in a way that turns work into thermal energy.
D is the same as C, except that it places the blame on the person using the machine, not the machine itself.
Hope I helped clear it up for you :)
The answer is D because they speard apart or interact in all boundaries.
What enzyme? But I do know that the RNA polymerase unhinges/ unwraps the DNA apart creating making an mRNA able to be made from the DNA
The answer is highway hypnosis. It is also known as white line fever. This happens when the driver while traveling in far places becomes fully focused on the roads and gains automatic responses to the vehicles on road situations which are correct. However, this is being done in an unconscious state.