How does Chinua Achebe use imagery in Girls at War, and Other Stories?

Imagery:

"Cletus got more obsessively hinged to his sugar and tea every single day was a deprivation, a dangerous case of an appetite growing on what it did not feed on..."

"Gladys, he thought, was just a mirror reflecting a society that had gone completely rotten and maggoty at the centre. The mirror itself was intact; a lot of smudge but no more."