Answer:
Your answer is dilation.
Step-by-step explanation:
A dilation either shrinks or makes the shape bigger. It changes the size.
The area of a triangle is half the product of the base and the height.
Since multiplication is commutative, the following expressions are equivalent:

So, option D is correct
The answer is 32. You have four trays each have 8 bars so multiply 8 and 4.
8*4=32