Answer: exposure
Explanation:
"To expose" is a verb that refers to putting someone at risk from something harmful. Exposure refers to the act of being exposed to something dangerous, such as radiation. So the best word to complete the sentence is "exposure":
Marie Curie conducted pioneering research on radioactivity and discovered the radioactive elements, not knowing how deadly exposure to radiation could be.
The words that best describe the tone of Barbara Jordan’s speech are B. respectful and reasoned
<h3>What is a Tone?</h3>
This refers to the author's attitude that is shown through his words which affects the general atmosphere of the story or narration or speech.
Hence, we can see that The words that best describe the tone of Barbara Jordan’s speech are B. respectful and reasoned
Read more about tone here:
brainly.com/question/14155277
#SPJ1
A qoutation
Ex. " I said she was walking to the store"
