What studies can show that robots' efficiency could be decreased if it is not charged or rested properly and adequately? I need a answer please

What is the central idea in this advice from branch rickey to jackie robinson?  

How does this excerpt develop the central idea that espionage during the civil war was often carried out by untrained citizens? it enhances the reader’s understanding by explaining why training was unnecessary. it changes the reader’s perception of what information a spy was able to obtain. it explains an ordinary person’s motivation for conducting espionage against the enemy. it adds moral complexity to espionage, due to the use of secret and dangerous methods.

What is the correct def of moif? an idea or object that recurs in a text