I’m more than a fair weather friend,
On me, you can depend,
To hang around at least ’til summer’s end.
I serve your house, the store, the school,
I’m liked everywhere ’cause I’m so cool.
Make CARP (fish) evolve into GOAT (mammal) by changing one letter at a time. Each change must produce a valid word in the English language. But there is a catch. The evolution must go through NEWT (amphibian) and CROW (bird). No word can be used more than once.