Is this a complete sentence, a sentence fragment, or a run-on sentence?

wondering about the distances between planets in our solar system.

a.
sentence fragment

b.
complete sentence

c.
run-on sentence

the illustration   that would give a reader a clear understanding of the text is a picture of men constructing the frame of a building.the frame is made of iron bars. the text describes the job of blacksmiths'. these were very organised and they had different names: "the driver" and "the heater". the text describes the way in which these men worked ; they worked iron pieces as if they were playing a sport. in fact, the text wants to show the men's skills. the text also puts some emphasis on the use of '' rivets'' in construction. this kind of nails were not always used in the construction of manhattan.

some examples:

"and with an underhand toss he hurled the smoking rivet straight at the catcher, who caught it in mid-air in his catching can." men's skills

"when the driver was ready for a new " the emphasis on the rivet ( special nail used in construction).

" it against a beam to remove any cinders, and jammed it into the waiting hole. " the emphasis on the rivet.

osaka, a gorgeous place to live, extraordinary sights, and a wonderful place to visit for vacation. watching nature change there it is a lovely experience i would like.

explanation:

i ain't gonna write your whole essay for you at least you have a starter

sorry i ain't gonna do the whole assignment for your class or whatever