Who are Shinobi?
Shinobi are the military force of each village. In the naruto world ninjas have ranks depending on their skill level. A academy ninja is a ninja that it's in the academy, it's like school where they teach the person the basic ninja skills. Academy students take formal and practical tests of all sorts and are taught basic ninja skills, such as martial arts, techniques, physical fitness, as well as extensive mental training such as math, science, history, and specifically these things in relation to their uses in battle tactics; academy students are also taught the way of the ninja. Basic weapon usage, such as kunai and shuriken, are commonly taught. Then the ninja moves on to being a the lowest level of ninja, Genin. Genin are given headbands with their village's symbol on it to represent what village they come from and that they are full fledged ninja. They get more missions and harder ones as well. Then there are chunin ninja who take more of a leadership role. They are are ninja who are qualified to watch over and guide other ninja.
Jonins are the elite ninjas. The Jonins, when taking a mission, are given an A, B, and mostly S rank missions. Even as achieving chunin demonstrates proficiency and skill, achieving jonin is a sign of mastery. Jonin are also able to teach ninjas of lower rank. The kages are the leaders of each village. They have to prepare everything as well as lead an entire village, etc. Anbu ninjas are ninjas that work in the shadows, they always have a mask on so that no one sees who they really are. They are alse gevin new names and are known to be really skilled. Theres medical ninjas who are able to heal the injured by using medical jutsu. They are given the role once in war to heal the comrades that are injured. Rouge ninjas also known as missing nin are ninjas who left their village. The akatsuki was a group filled with them.
What is chakra?
Chakra is the moulding of the physical energy. It is present in every cell of the body and the spiritual energy gained from exercise and experience. Once moulded, it can be channelled through the chakra circulatory system, which is to chakra as the regular circulatory system is to blood, to any of the 361 chakra points (called tenketsu) in the body. Through various methods, the most common of which is hand seals, the chakra can then be manipulated to create an effect that would not be possible otherwise, such as walking on water, exhaling fire or creating illusions.
What are basic 5 elements?
The basic five elements are fire, water, wind, earth and Lightning.
What is the definition of Ninjutsu?
Ninjutsu Is a term used for any technique. allows the user to do something that they otherwise would be incapable of doing, including the usage of weapons. Ninjutsu and Genjutsu are deadly but the difference between the two is that ninjutsu is real. Ninjutsu most of the time relies on chakra and hand seals. Ninjutsu could also be used to heal others and to manipulate nature. Ninjutsu is also using of the chakra to give things form, with the use of handseals and sometimes not handseals, but also giving your chakra "shape" and "nature"which also leads to how we use the basic 5 elements.