You can make an object's stroke or fill lighter by either lowering the tint or the

opacity of the stroke or fill. What's the difference between lowering an object's
tint and lowering its opacity?

What will be an ideal response?

If you were to specify a 50% tint for the fill of an object and a 50% opacity for a
copy of the object, you wouldn't be able to tell the difference between the two
unless they overlapped other objects. An object with a 50% tinted fill is opaque;
an object whose fill has a 50% opacity is translucent.