unity 2d project

With out 
the
 Box 
Collider, 
the
 object 
would
 not 
be
 able 
to
physically
 interact 
with 
its 
environment. 
All
 of
 the
 settings 
here
are
 the 
default 
settings.

This 
also 
allows 
the 
crate
 to
 physically
 interact 
with 
its
environment.
The
 settings 
here 
are 
also
 the
 default 
values,
 but 
you 
can
 adjust 
them
 to
 make 
it 
more 
massive, 
to 
ig­nore 
gravity,
or 
to 
be
 immovable.

• This 
is 
the
 component 
that 
restricts 
our
 movement 
to
 our 
2D
plane. 
All 
settings 
are 
default 
except 
for
 the 
following 
four:
• ‣ ZMotion: 
Locked
• ‣ Angular
XMotion: 
Locked
• ‣ Angular
YMotion: 
Locked
• ‣ Configure
in
World
Space:
 Checked

These 
assign 
the 
proper 
mesh 
and 
texture
 so 
it 
renders 
in 
the
scene.