The statements are given below suits for,
1 . Possess a protective shell or exoskeleton
2. Small-sized
3. Ability to fly
4. produce large numbers of offsprings quickly .

Options

A. birds
B. insects
C. mammals
D. reptiles

Answer

To solve the question, we need to analyze the given statements and determine which group of organisms they best describe. The statements are:

1. Possess a protective shell or exoskeleton
2. Small-sized
3. Ability to fly
4. Produce large numbers of offspring quickly

### Step-by-Step Solution:

**Step 1: Analyze the First Statement**
- The first statement mentions a "protective shell or exoskeleton." This is a characteristic of organisms like insects, crustaceans, and some mollusks. Birds and mammals do not have an exoskeleton; they have an endoskeleton.

**Hint:** Think about the types of skeletons different groups of animals possess.

**Step 2: Analyze the Second Statement**
- The second statement describes "small-sized." Insects are generally small, while birds and mammals can vary widely in size, often being larger than insects.

**Hint:** Consider the average size of the groups being discussed.

**Step 3: Analyze the Third Statement**
- The third statement indicates "ability to fly." Many insects, such as butterflies and bees, can fly. Birds are also capable of flight, but they do not possess an exoskeleton.

**Hint:** Identify which groups are known for their flying capabilities.

**Step 4: Analyze the Fourth Statement**
- The fourth statement mentions the ability to "produce large numbers of offspring quickly." Insects are known for their high reproductive rates, often laying hundreds or thousands of eggs at once. Birds and mammals typically have fewer offspring.

**Hint:** Think about the reproductive strategies of different groups of animals.

**Step 5: Conclusion**
- Based on the analysis of all four statements, insects fit all the criteria: they have an exoskeleton, are generally small-sized, can fly, and reproduce in large numbers quickly. Therefore, the correct answer is **insects**.

### Final Answer:
The statements suit **insects**.