Answer:
D.)
Explanation:
To be proportional from one thing to another means to have the same relationship between the two and in this case, the same relationship between the height and the base. The relationship between the height and base in the triangle is 1.6 to 2.5, and to have a proportional relationship, you need to have the same relationship. The option D.) has the same relationship between the height and base as the relationship 1.6 to 2.5 is the same as 0.8 to 1.25, because it's the same thing, just divided by 2 in both parts.
Hope this helped you understand!