Question

1. what does a negative value of δv (change in sand volume) indicate?

a. sand gain (accretion)
b. sand loss (erosion)
c. no change
d. increased beach width

Explanation:

The symbol $\Delta V$ represents the change in sand volume. A negative value for $\Delta V$ means that the final volume of sand is less than the initial volume. This indicates that sand has been lost, which is known as erosion. Sand gain (accretion) would correspond to a positive $\Delta V$ as the final volume is more than the initial. "No change" would mean $\Delta V = 0$. Increased beach width is not directly related to the sign of $\Delta V$ in the context of what the symbol represents (volume change).

Answer:

B. Sand loss (erosion)