A student is studying calcium, a highly reactive element that humans need for strong bones. Which characteristic of calcium is most closely related to its chemical reactivity?

the pronoun reference replaces a noun, but you have to make sure there's no room for confusion.

in the first sentence "her" could be referring to shely or to the sister. the answer there is "shelly called her sister and told her about the new baby."

in the second sentence "it" could be referring to the roof or the floor. the answer there is "since the roof leaks on the family room floor, we need to repair the roof."

yes this is def an analogy

a comparison between two things

explanation:

i wonder if it is possible to place reagans testimony and paragragh 18, so we can compare and contract the ideas in the text.

in this excerpt, the uniqueness of laura’s speech is revealed by her word usage