If a block of wood floats in water, what does that mean about its density?

1) its density is greater than the density of water
2) its density is not great enough to displace the water
3) its density is equal to the density of water
4) its density is less than the density of water

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