Which sentence uses a linking verb? a. ms. chang refilled her mug with water. b. ms. rodriguez asked for two volunteers. c. mr. friedman seemed tired this morning. d. mr. chomsky offered his students advice.

the answer is a.

explanation:

the clause "looking toward the south" modifies "a funnel cloud." it's not really the cloud that's "looking," but grammatically, that clause is modifying the cloud.

c. in order of atomic number