Answer:
skimming the text
Explanation:
This is because you cant do the rest of them without reading it first
The common noun here is "frog" as the only other noun, Many, is not a common noun - it's a proper noun.
"frog" here is the object of the sentence: it's the object of the verb "caught" of which the subject is Mary
my mother is seated next to the woman wearing a red hat