____________________
mammals
are
viviparous
.
They
have
skin
,
hair
or
____________________
____________________
their
bodies
.
They
can
be
carnivores
,
____________________
or
omnivores
.
They
breathe
through
their
____________________
.
Most
of
them
have
____________________
legs
.
Dolphins
,
____________________
and
____________________
are
mammals
which
live
in
the
ocean
.
The
____________________
are
the
only
mammals
that
can
fly
.
