Sentence fluency refers to the ease with which words and groups of words flow when read or spoken, so the best answer is "Combining sentences to use complex structure" although that's not a great definition.
The simple predicate is gave.
Answer: Naruto Uzumaki
Explain: he’s just such a hard working kid and he never gives up even if he’s at the verge of dying...it really amazes me how he never loses hope.
