Induction conduction and extra definitons that I need to know

Question 1

how does induction charge and object

Answer 1

• one neutral and one charged
  bring charged object to close (not touching) to neutral grounded object

remove ground and then charged object

conclusion - oppositely charged

Question 2

how does contact charge an object

Answer 2

one neutral and the other charged

touching charged object to neutral object

similarly charged

Question 3

Friction

Answer 3

Both objects natural
rub two objects together
conclusion
opposite charged