Select the option that is nearest in meaning to the underlined word.
His lectures are often wordy and pointless.

The underlined word 'Wordy' means using or expressed in rather too many words.
Meanings of the given options are:
Diffuse means spread out over a large area; not concentrated.
Concise means giving a lot of information clearly and in a few words; brief but comprehensive.
Garrulous means excessively talkative, especially on trivial matters.
Volatile means liable to change rapidly and unpredictably, especially for the worse.
The word that is nearest in meaning to the underlined word 'Wordy' is 'Garrulous'.