Answer:
The focal length or depth of field
Explanation:
<span>The opposite of program music is absolute music
>>Program music
It is described as an instrumental music that is tagged with a poem, a story and sometimes an idea.
>> Instrumental music which is mainly composed purely as music, and not intended to illustrate something else refers to absolute music.</span>
Answer:
Must have four sides, must be able to open and close properly, and must be in the shape of a box.
Explanation:
That is what i could think of.