**Core Concept**
Piaget's cognitive theory describes the development of cognitive processes in children, including their perception, problem-solving, and understanding of the world. Animism and constructivism are two key concepts in this theory, representing the early stages of cognitive development.

**Why the Correct Answer is Right**
In Piaget's theory, Animism refers to the stage where children attribute human-like qualities and intentions to non-human objects, such as animals, toys, and even inanimate objects. This stage is characterized by the child's inability to distinguish between the self and the environment. Constructivism, on the other hand, is the process by which children construct their own knowledge and understanding of the world through active experimentation and exploration. This stage is marked by the child's increasing ability to understand cause-and-effect relationships and to develop problem-solving skills.

Animism and constructivism are seen in the **Sensory-Motor stage**, which is the first stage of Piaget's cognitive development theory. During this stage, children learn through sensory experiences and motor activities, and they develop an understanding of the world through trial and error.

**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because the **Pre-Operational stage** is the second stage of Piaget's cognitive development theory, characterized by the development of language and the ability to think symbolically, but still lacking in logical operations.

**Option B:** This option is incorrect because the **Formal Operational stage** is the fourth and final stage of Piaget's cognitive development theory, marked by the development of formal thinking and the ability to reason abstractly.

**Option C:** This option is incorrect because the **Concrete Operational stage** is the third stage of Piaget's cognitive development theory, characterized by the development of logical operations and the ability to think abstractly, but only with concrete objects and events.

**Clinical Pearl / High-Yield Fact**
It's essential to remember that Piaget's cognitive development theory is a framework for understanding the development of cognitive processes in children, and it has implications for education and child development.

**Correct Answer:** B.