Answer:
a. True
Step-by-step explanation:
In southwestern regions of the United States, the annual rainfall is typically low, which means that the natural precipitation is not enough to sustain plant life. This makes irrigation, or the artificial application of water to land, especially important in these regions for maintaining home landscapes and gardens. Without irrigation, it would be difficult to grow plants and maintain a healthy lawn, which is why it is considered an essential component of gardening and landscaping in this region. Hence, the statement "Irrigation is especially important in southwestern home landscapes and gardens because annual rainfall is low" is true.
ALLEN