Fire has destructive powers and can its jutsu's are usually used with Tiger seal.
Uchiha clan's use fire as primary element and its even said that Sharingan has a Root to fire natured chakra.
Ok , I want you to breathe calmly and and try to burn this leaf
alright...
*i hold the leaf in the palm of my hand and calmly concentrate my fire chakra on it. it begins to burn in the center and then quickly disintergrates in a puff of fire*
*i hold a leaf in my hand and focus fire chakra on it. the leaf starts to burn where i was holding it and it slowly spreads until theres only a scrap of it left*
is that better?
this should be easy.
*i take a deep breath lasting 3 seconds and let it all out. then i do it again while mixing my held breath with fire chakra and shoot out a small fireball from my mouth*
*i breath in deeply again and as i let it out i mix it with fire chakra shooting out a bigger fire ball that travels 10 ft and dies out*
done. now what?
eh? im not a grill but alright...
*i take a breath and when i exhale i mix a little fire chakra into it changing my breath into flammable gas*
ew, it smells.
im not here for ur amusement
*i take a breath mixing more fire chakra into it and let out a larger cloud of gas*
O_O i think i should back up...
*runs away*
again...?
*i inhale, completely filling my lungs, then i add fire chakra to the air i forcefully breath out creating a giant fireball that burns all the vegitation in its path*