help pls i really need help

Answer:
Step-by-step explanation:
We see the segment of length of 3 is divided by 3 and each of units divided by 4.
The number of purple rectangles is 12.
This can be expressed as:
The other options are not matching this model. They all end up with part of the line segment.
Three of them result in 3/4 and one results in 4.