What happens when the top predator is removed from a ecosystem?

What country was south vietnam resist a communist takeover before the united states stepped in? a. germany b. france c. britain d. japan

Clouds thar look like whisps of hair are

Historians have recently discovered a historical journal published in the early twentieth century. the journal contains facts based on original sources about the downfall of the early byzantium empire. historians consider this long-lost journal to be a breakthrough in their understanding of the byzantium empire. based on this information, the journal is a source.