The Desert

Akpos is right back from school, tired and hungry:

MOTHER: Akpos, you are back?
AKPOS: Yes mum.
MOTHER: What were you taught in school today?
AKPOS: Agriculture.
MOTHER: Which topic?
AKPOS: The Desert!
MOTHER: What is a desert?
AKPOS: A desert is a barren area of land where plants or grasses hardly grow on.
MOTHER: Good boy. Give an example?
AKPOS: Dad's Head.