Final answer:
Lawns should be mowed so that at least 1/2 of the leaf area is removed during mowing, which stimulates grass growth, helps prevent grass from reproducing, and maintains the health and appearance of the grass.
Step-by-step explanation:
Mowing lawns is an important aspect of lawn care. According to the given statement, lawns should be mowed in such a way that at least 1/2 of the leaf area is removed during mowing. This is because removing a significant portion of the leaf area stimulates the growth of the grass, making it healthier and greener.
By mowing the lawns and removing leaf area, the grass is also prevented from reproducing. As a result, the mowed field adapts by flowering earlier, as described in option c. This flowering earlier helps the grass to focus its energy on regrowth and recovery.
Therefore, mowing lawns regularly and ensuring that at least 1/2 of the leaf area is removed helps maintain the health and appearance of the grass.