Produce a sentence which mentions all of these concepts: decay, perch, seed, squirrel, top

red squirrel feeding on seeds and nuts while perched on the top of a decaying tree stump

Produce a sentence which mentions all of these concepts: mountain, plane, runway

A small plane on a grass runway in the mountains.

Produce a sentence which mentions all of these concepts: bone, dog, fight
two dogs are fighting over a bone