Why is carbon present in so many types of molecules
a. it can form up to four covalent bonds
b. it is abundant on earth
c. it can become an ion
d. it has valence electrons?

Read the passage. which statement would be the best summary to give the argument meaningful context? a. the passage is fine the way it is. b.th word "debate" should be removed, because it indicates disagreement. c. the word "claim" should be removed because this is not the claim. d. the sentence that begins " i personally believe" should be removed because it shows bias.