<s>
Science	B-Application
Horizons	I-Application
Survival	I-Application
is	O
a	O
ZX	B-Operating_System
Spectrum	I-Operating_System
video	O
game	O
developed	O
by	O
Five	O
Ways	O
Software	O
.	O
</s>
<s>
It	O
was	O
published	O
by	O
Sinclair	O
Research	O
in	O
association	O
with	O
Macmillan	O
Education	O
in	O
1984	B-Application
.	O
</s>
<s>
The	O
aim	O
was	O
to	O
teach	O
users	O
about	O
food	O
chains	O
;	O
as	O
an	O
insect	O
life	O
is	O
short	O
,	O
with	O
the	O
constant	O
danger	O
of	O
being	O
eaten	O
by	O
a	O
bird	O
-	O
but	O
as	O
an	O
eagle	O
the	O
player	O
is	O
at	O
the	O
top	O
of	O
the	O
food	O
chain	O
with	O
mankind	O
or	O
starvation	B-Operating_System
as	O
the	O
only	O
dangers	O
.	O
</s>
<s>
The	O
simulation	O
allows	O
the	O
player	O
to	O
be	O
one	O
of	O
six	O
animals	O
:	O
a	O
hawk	O
,	O
a	O
robin	O
,	O
a	O
lion	B-Algorithm
,	O
a	O
mouse	O
,	O
a	O
fly	O
or	O
a	O
butterfly	B-Application
.	O
</s>
<s>
The	O
game	O
ends	O
when	O
the	O
animal	O
dies	O
,	O
either	O
through	O
starvation	B-Operating_System
,	O
dehydration	O
,	O
being	O
killed	O
by	O
a	O
predator	O
,	O
or	O
old	O
age	O
.	O
</s>
