**Explanation:**

The correct answer is **option 'A' Herbs**.

**Definition of Herbs:**
Herbs are small plants that have soft, perishable stems and usually do not grow taller than five feet. They are known for their medicinal, culinary, and aromatic properties. Herbs are generally categorized as annuals or biennials, which means they complete their life cycle within one or two years.

**Characteristics of Herbs:**
1. **Small plants:** Herbs are usually small in size, with a height of less than five feet. They have delicate stems and leaves.
2. **Soft, perishable stems:** Unlike shrubs and trees, which have woody stems, herbs have soft and non-woody stems. These stems are not durable and can be easily damaged or broken.
3. **Annuals and biennials:** Herbs are classified as annuals or biennials. Annual herbs complete their life cycle within one year, while biennial herbs take two years to complete their life cycle. They grow from seed, produce flowers and seeds, and then die.
4. **Medicinal and culinary uses:** Herbs are widely used in cooking for their flavor and aroma. They are also known for their medicinal properties and are used in traditional medicine to treat various ailments.

**Distinguishing Herbs from Shrubs and Trees:**
1. **Shrubs:** Shrubs are larger than herbs and have woody stems. They are perennial plants, meaning they live for many years. Unlike herbs, shrubs can grow taller than five feet and have a more robust structure.
2. **Trees:** Trees are even larger than shrubs and herbs. They have a single main trunk, which is usually woody and durable. Trees can grow much taller than five feet and have a long lifespan.

In conclusion, herbs are small plants with soft, perishable stems that grow up to five feet in height. They are generally annuals or biennials and have various uses, including culinary and medicinal.

Answer is a