The Chomsky Hierarchy is a classification of languages based on:a.Their expressiveness and generative power.b.Their alphabet size.c.Their decidability.d.The number of states in their automata.

The Chomsky Hierarchy is a classification of languages based on their expressiveness and generative power. This hierarchy, proposed by Noam Chomsky, is a way to categorize languages based on the complexity of the grammars that generate them.

Here's a step-by-step breakdown:

1. The Chomsky Hierarchy consists of four types of grammars (Type 0, Type 1, Type 2, Type 3), each corresponding to a type of language and a type of automaton that recognizes it.

2. Type 0 grammars generate recursively enumerable languages, which are the most complex and expressive. These are recognized by a Turing machine.

3. Type 1 grammars generate context-sensitive languages. These are recognized by a linear bounded automaton.

4. Type 2 grammars generate context-free languages. These are recognized by a pushdown