A
____________________
is
an
object
of
whatever
relatively
simple
____________________
is
necessary
for
its
user
to
hold
and
operate
easily
to
perform
a
simple
task
(
like
moving
,
lifting
,
breaking
,
holding
,
turning
,
bending
)
not
as
____________________
performed
or
not
possible
,
____________________
,
or
desirable
to
perform
using
a
bodily
____________________
alone
.
Although
many
animals
use
simple
____________________
,
only
human
beings
,
whose
use
of
stone
tools
dates
back
hundreds
of
millennia
,
use
____________________
to
make
other
____________________
.
The
set
of
tools
needed
to
____________________
different
tasks
that
are
part
of
the
same
activity
is
called
gear
or
____________________
.
While
one
may
apply
the
term
tool
loosely
to
many
things
that
are
means
to
an
end
(
e
.
g
.
,
a
fork
)
,
strictly
speaking
an
object
is
a
tool
only
if
,
besides
being
constructed
to
be
held
,
it
is
also
made
of
a
material
that
allows
its
user
to
____________________
to
it
various
degrees
of
force
.
If
repeated
use
wears
part
of
the
tool
down
(
like
a
knife
blade
)
,
it
may
be
possible
to
restore
it
;
if
it
wears
the
tool
out
or
breaks
it
,
the
tool
must
be
replaced
.
Thus
____________________
falls
under
the
taxonomic
category
implement
,
and
is
on
the
same
taxonomic
rank
as
____________________
,
____________________
,
____________________
,
or
ware
.
