It is the combination of bird and nest, the combination of beaver and dam, that gives a competitive edge to the animals who build them.
(It; is; the combination of bird and nest, the combination of beaver and dam) (the combination of beaver and dam; gives; a competitive edge; to the animals) (the animals; build; them)
It the combination of beaver and dam the animals
is gives build
the combination of bird and nest, the combination of beaver and dam
a competitive edge to the animals
them