Some
____________________
animals
have
hard
____________________
that
protect
their
____________________
(
shells
:
1
piece
/
2
____________________
,
very
hard
____________________
or
thinner
shells
)
Others
don´t
have
any
kind
of
____________________
covering
____________________
invertebrate
animals
are
____________________
:
they
are
born
from
____________________
