The last options seems right. the one that is " Trees that are not native to North Texas, are often killed by heat and drought. "
It seems that your question misses relevant details so that we can provide the correct answer, but I hope this will help you. Context clues are words that are used as hints within a sentence in order to help provide meaning or understanding of a difficult or unfamiliar word. There are five types of context clues and the five types of context clues include Definition/explanation, restatement/synonym, contrast/antonym, inference/general context, and punctuation. Hope this helps.
