The correct option for a suitable grass for lawns is C. Cynodon dactylon. Explanation of the Correct Answer Cynodon dactylon, commonly known as Bermuda grass, is widely recognized as one of the best grasses for lawns, especially in warm climates. Here’s why it is the correct choice:

1. Growth Habit: Cynodon dactylon has a dense growth habit, which allows it to form a thick, lush lawn. This density helps to suppress weeds, making it easier to maintain a healthy lawn.
2. Drought Resistance: This grass is highly drought-resistant, which means it can survive with less water compared to other grass types. This characteristic is particularly beneficial in regions where water conservation is important.
3. Durability: Bermuda grass is known for its durability and ability to withstand heavy foot traffic. This makes it ideal for lawns that are used for recreational purposes, such as sports fields and playgrounds.
4. Quick Establishment: Cynodon dactylon establishes quickly from seed or sod, allowing for faster lawn development. This is advantageous for homeowners looking to have a green lawn in a short period.
5. Adaptability: It adapts well to various soil types and can thrive in both sandy and clay soils, making it versatile for different landscaping needs.

Explanation of Why Other Options Are Incorrect Now, let’s look at the other options and why they are not suitable for lawns: A. Andropogon gayanus (Gamba Grass): - Description: Gamba grass is a tall perennial grass that is primarily used for pasture and erosion control rather than for lawns. - Reason for Unsuitability: It grows too tall and coarse for a lawn setting, making it less aesthetically pleasing and harder to maintain as a lawn grass. It is also not as tolerant of foot traffic as Cynodon dactylon. B. Pennisetum purpureum (Elephant Grass): - Description: Elephant grass is a tall, robust grass often used for fodder and biomass production. - Reason for Unsuitability: Similar to Gamba grass, it grows very tall and is not suitable for lawns. It requires significant maintenance and is not designed for aesthetic lawn purposes. D. Panicum maximum (Guinea Grass): - Description: Guinea grass is another tall grass species primarily used for grazing livestock. - Reason for Unsuitability: While it can be used in some landscaping applications, it is not ideal for lawns due to its height and growth habit. It does not provide the fine texture and low growth that is typically desired in lawn grasses. Summary of Key Points

• Cynodon dactylon (Bermuda grass) is the best choice for lawns due to its dense growth, drought resistance, and durability.
• Other options like Andropogon gayanus, Pennisetum purpureum, and Panicum maximum are primarily used for pasture or fodder and are not suitable for lawn applications.
• When selecting grass for lawns, consider factors such as growth habit, maintenance needs, and adaptability to local conditions.

Revision Summary

• Cynodon dactylon is the ideal grass for lawns due to its density and durability.
• Other grasses listed are primarily for pasture and not suitable for lawn use.
• Consider drought resistance and growth habit when selecting lawn grasses.
• Bermuda grass establishes quickly and adapts well to various soil types.