Samuel Morse's telegraph line between Washington, D.C. and Baltimore was successful.
Answer:
it
Explanation:
It cannot be "them" becasue telephone is singular and them is plural.
It can't be "her" becasue its not a person
It cant be "that" becasue it changes the tense of the sentence
So the only answer left is "it"
Answer:
A molecules is a particles made up of <u>ions</u> or atoms.
Hope it helps.
