Answer:
Conserve.
Step-by-step explanation:
According to Piaget's framework, Ernesto can't conserve and Lara can conserve. According to Piaget's Theory of Cognitive Development conservation of matter is a process. Ernesto has seen the changes in the dough but he thinks there is more matter. On the other hand, Lara has seen the changes too, but she realized that the amount of dough is the same before and after the changes. No dough was added or taken from the original amount. This is called reversibility and is a necessary condition to acquire conservation.