Mammals
are
____________________
so
they
born
from
their
mother´s
womb
.
They
have
backbone
so
they
are
____________________
.
Most
of
them
have
four
____________________
and
they
move
on
land
.
They
have
they
body
cover
of
hair
and
____________________
.
Birds
are
____________________
so
they
lay
____________________
.
They
have
____________________
so
they
are
vertebrates
.
They
have
two
____________________
with
____________________
and
also
____________________
legs
.
They
use
their
____________________
to
eat
.
