Final answer:
Croissant dough contains yeast and has a richer, more tender texture due to its higher butter content and often the inclusion of milk, whereas puff pastry does not contain yeast and has a flakier texture.
Step-by-step explanation:
The difference between puff pastry and croissant dough is that b. croissant dough contains yeast and puff pastry does not. Puff pastry is made by layering dough and fat to produce a very flaky texture, using a process called lamination. Croissant dough also involves lamination, but it includes yeast in its ingredients, which causes the dough to rise and results in a lighter, airier texture with distinct layers. Croissant dough typically has a higher butter content and often includes milk, which contributes to its rich flavor and tender texture.