Earth is one of the 5 basic elements. In real life earth is a planet, it is the planet we all live on. There are many forms of earth, soil, mud, or regular rock. In naruto eaarth branches off into many other nature affinities such as lava release or wood release. Earth is strong against water because eartth chakra is denser then water and it can absorb water. Earth is weak against lightning because the lightning can travel through and easily break it up. Earth is neutral to fire and wind. Earth release is most common to Iwagakure. A few ninjas that use earth release are Akatsuchi, onoki, and deidara.
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* I quickly begin to build up chakra within me. Mainly focusing on the properties of earth. Hard, Dense, and rough. I the concentrate said chakra towards my feet. As a result of this the ground begins to tremble. I then proceed to manipulate this chakra in the ground to raise me into the air. In which i jump off of, while in the air i manipulate the earth around me to make small yet dense rods of earth in which i propell at the dummies extremly accuratly. Thus knocking the, over
After recieving the command
* i begin to build up a good amount of earth chakra within me. Once i feel the earth chakra currculating throughout my body i manipulate the surrounding earth around me to create a shield out of hard dense earth.
This technique is useful because it'd be able to block certain attacks up to a certain rank.
p.s bad against lightning based attacks