Look
again
at
the
illustration
of
wildlife
in
a
game
reserve
.
There
is
____________________
between
the
different
populations
to
form
a
____________________
.
If
we
now
study
the
communities'
interaction
with
the
non
-
living
things
in
their
environment
,
then
we
are
studying
____________________
at
the
ecosystem
level
.
Think
of
the
different
populations
of
organisms
that
form
a
____________________
in
the
Kruger
National
Park
,
such
as
zebras
,
elephants
,
lions
,
springboks
,
different
types
of
trees
and
grasses
.
Now
look
at
this
photo
of
some
of
these
populations
at
a
watering
hole
.
In
this
photo
,
we
study
the
interaction
between
the
living
organisms
and
the
non
-
living
environment
.
As
an
example
,
the
zebra
and
springbok
drink
water
,
while
the
elephant
pours
mud
over
itself
to
cool
off
.
It
is
an
____________________
.