"Alright. It's a good start. I'll fill in bits and pieces you might have missed." Tobirama listens closely to what the student thought of in regards to each and everyone of the question he asked. "A ninja. Well, i suppose it really has to depend on your perspective but one thing is for sure, they all serve to protect superiors, or if you're the superior, to protect the ones governed. Ninjas perform individual and group missions to earn money for their village, and a reputation for themselves. There are rogue ninja, who decides it's best for them to not be allied with any official villages, but of course, they'd be wanted. Anyways, for your second question, chakra is the combination of spiritual (mind energy, kind of like "aura's") and physical (body energy you use to for physical activities) energies from all sentient beings. To elaborate more on that topic, chakra is used to perform ninjutsu to aid a person in battle. For the third one, you have the basics of it but for genjutsu, i'd like to add that they can cause damage, mental damage. Advanced forms of genjutsu like mangyekyo sharingan, or Kurama can deal physical damage to a person if they are caught in the genjutsu. Fourth question, correct! I basically wanted to know whether you understood the elemental strengths and weaknesses which is vital in battle. Fifth question, Correct for the most part. Elemental natures can be combined to create a new element, like water and ice which is exclusive to one clan. There are many KKG's that have different applications and usages, and of course, different sets of strengths and weaknesses. Number 7, good. Basically, size and mass matters. You'd obviously need to take into consideration the rank of the technique, but for the most part, you are correct. Even though some techniques are greater in power, in terms of rank and all, the weaker technique wins plainly because of its size. For example, Rasengan is A-rank while Exploding Colliding Wave is B-ranked. Because of rasengan's small size compared to such a large wave, you can't possibly hope for Rasengan to come out victorious if the two were to clash. Last question, nature transformation changes it to those elements by changing the properties of chakra to a specific element, like warmth with fire, or sharpness with wind. Shape manipulation also includes movement, direction, etc.
We covered a lot of information. Shall we proceed, or do you have any further questions?"