Final answer:
A high ratio cake, which is high in both fat and sugar, would have better keeping qualities compared to a low-fat sponge cake.
Step-by-step explanation:
In terms of keeping qualities, a high ratio cake, which is high in both fat and sugar, would be expected to have better keeping qualities compared to a sponge cake, which is low in fat.
Fat and sugar act as preservatives in cakes, helping to retain moisture and prevent staleness. The higher fat and sugar content in the high ratio cake creates a more stable and moist texture, allowing it to stay fresher for longer periods.
Therefore, the correct answer to this question is High ratio cake.