A courtship dance is one example of the kind of.............. that some birds use to attract a mate.
A courtship dance is one example of the kind of DISPLAY that some birds use to attract a mate.
Usually, when a dog bares its teeth, it’s making a ........... – but sometimes this can also be a sign of excitement.
Usually, when a dog bares its teeth, it’s making a THREAT – but sometimes this can also be a sign of excitement.
Some animals growl when they want to .......... another animal that approaches their family.
Some animals growl when they want to CHALLENGE another animal that approaches their family.