Ninjutsu training with seven-scaled boy

[Hinato]

*waits for sensei*

 

[The Seven-Scaled boy]

(don't worry you didn't bug me I actually forgo---I mean my sister was using the laptop <.< >.> <.<)

Ok, i suppose this is from scratch. Now, tell me the following try not to use any other source of info other than your brains please xd

What is ninjutsu?
Ninjutsu has a primary component, which is it? Expand.
How does ninjutsu affect you when used agains you and what uses can you see for ninjutsu?

 

[Hinato]

Ninjutsu can be any technique performed by any ninja through the use of chakra.
idk maybe hand seals or shape and nature manipulation eg rasengan
Ninjutsu can be used to attack or defend and