Over time, dried lava from an old volcano is worn down and broken into small pieces. When these pieces pile up and are cemented together to form new rock, how would this new rock be classified?.

Afarmer who is grown corn for the past five years notices in the sixth year that the his harvest is significantly smaller, despite an increase in labor on the farm. the following year, the harvest continue to decline. which of the following explanations most plausibly accounts for the reduction in corn yield? a) soil degradation b) desalinization c) better irrigationd) terracing