Animal
survival
is
a
fascinating
and
complex
subject
.
As
the
photos
____________________
(
SHOW
)
,
nature
usually
____________________
(
PLAY
)
tricks
on
us
.
Two
insects
____________________
(
SIT
)
in
a
flower
.
They
both
____________________
(
LOOK
)
like
bees
,
but
one
of
them
____________________
(
NOT
BE
)
a
real
bee
.
It
____________________
(
IMITATE
)
a
bee
in
order
to
protect
itself
from
possible
predators
.
The
real
bee
____________________
(
HAVE
)
a
sting
,
which
it
uses
as
a
weapon
to
attack
its
enemies
.
However
,
the
hover
fly
that
is
similar
to
bee
____________________
(
NOT
BE
)
dangerous
.
It's
completely
harmless
.
This
imitation
of
one
species
by
another
often
____________________
(
HAPPEN
)
in
nature
and
is
called
mimicry
.
Animals
____________________
(
COPY
)
the
appearance
,
actions
and
sounds
of
another
animal
and
this
____________________
(
HELP
)
them
to
survive
.
