The meaning of the underlined words are:
- Different sources
- Harmful and poisonous
What is a Context Clue?
This refers to the use of hints in a given sentence or text to give the meaning of a word, based on its context usage.
Hence, we can see that from the given sentences, there are underlined words and following words that show the context and the meanings are the use of different sources and poisonous air.
Read more about context clues here:
https://brainly.com/question/11247029
#SPJ1
