Why did olmec civilization collapse?

Around 400 B.C. La Venta went into decline and was eventually abandoned altogether. With the fall of La Venta came the end of classic Olmec culture. Although the descendants of the Olmecs still lived in the region, the culture itself vanished. The extensive trade networks the Olmecs had used fell apart. Jades, sculptures, and pottery in the Olmec style and with distinctly Olmec motifs were no longer created.

Explanation:

opinion because one person might not like silk