can someone help me with model b. what is model b. 1. 2. 4. 1/4. 2/4. 4/4.

Here, we want to shade a fraction that is equivalent to 1/2
We have four boxes to fill ;
We will have to shade 2 parts in model B. When 2 parts out of 4 parts are shaded, model B will show the equivalent fraction of 2/4