If air kills you and helps you is it good or bad?

“i didn't know that cheshire cats always grinned; in fact, i didn't know that cats could grin.” “they all can,” said the duchess; “and most of 'em do.” “i don't know of any that do,” alice said very politely, feeling quite to have got into a conversation. “you don't know much,” said the duchess; “and that's a fact.” what is the effect of the short sentences on the dialogue? they make the dialogue smooth and serene. they make the dialogue lively and humorous. they make the dialogue formal and elegant. they make the dialogue into a song.

In hard times by charles dickens, mr. gradgrind’s name can be interpreted in several ways. the selection supports all of the following interpretations except he grinds out graduates who are similar to each other as if he were running a factory he grinds the importance of facts into students’ heads he grinds down children by crushing their imaginations he grinds his teeth together, suggesting his intolerance for fantasy

Based on your knowledge of word parts what does the word intervene mean