Why __________ (do/does) lions have sharp teeth? - Because ________ (it/they) eat meat.
do, they
Why __________ (do/does) zebras have stripes? - Because ________ (it/they) hide in the grass
do, they
A spider _________ (use / uses) its web to catch small bugs.
uses
Butterflies __________ (use / uses) their wings to fly.
use
Why __________ (can/can't) a penguin fly? - Because it ________ (have/has) short wings. .
can't, has
Frogs _________ (use / uses) their long tongue to catch bugs.
use
Why _________ (do/does) an ostrich have long legs?
does
Why __________ (do/does) an owl have big eyes? - Because it ________ (need / needs) to see in the dark
does, needs