Step 1: Context from the story.
In "Footprints Without Feet," Griffin, after becoming invisible, created chaos in the village. Mr. Jaffers, the constable, tried to arrest him but was shocked because Griffin appeared to have no head — as he was invisible.
Step 2: Analyzing the options.
(A) a head: Correct, Griffin seemed headless because his body was invisible.
(B) legs: Incorrect, his legs were invisible too, but the passage specifically highlights the missing head, which shocked everyone.
(C) eyes: Incorrect, this detail is not emphasized in the arrest scene.
(D) glasses: Incorrect, Griffin did use glasses sometimes, but that is not the answer here.
Step 3: Conclusion.
The correct answer is (A) a head.