The western and eastern Sierra Nevada have substantially different species of plants and animals, because the east lies in the rain shadow of the crest. The plants and animals in the east are thus adapted to much drier conditions.
Answer:
California’s Central Valley
Explanation:
The Excerpt explained the disaster caused by the Dust Bowl, in which many people migrated from their homes and farms in and around places like Oklahoma, Arkansas, Missouri, Iowa, Nebraska, Kansas, Texas, Colorado, and New Mexico.
It was recorded that about 3.5million people migrated from the aforementioned areas, and majority of them, moved to the California Central Valley, with about 86,000 people reported to have relocated to California in the first year after the Dust bowl.
And based on statistics of the Bureau of Agricultural Economics, it was recorded that about 116,000 families eventually arrived in California in the 1930s.
Hence, the most affected by the migration spawned by the environmental disaster highlighted in the passage is California’s Central Valley.
