PLEASE HELP ME Which combination of factors makes it particularly difficult to address skewed sex ratios?
A. cultural preference for boys combined with limited medical technology
B. cultural preference for boys combined with coercive population control policies
C. limited medical technology combined with coercive population control policies
D. cultural preference for girls combined with limited medical technology
E. cultural preference for girls combined with coercive population control policies

These factors threaten north americas ecosystems

Why might a single rock layer exhibit different types of sedimentary rocks within it? view available hint(s) why might a single rock layer exhibit different types of sedimentary rocks within it? such a rock layer, termed a facies, when traced laterally represents a variety of depositional environments that formed in a sequence over time. such a rock layer, termed a facies, when traced laterally represents a single depositional environment that formed over time. such a rock layer, termed a facies, when traced vertically represents a variety of depositional environments that formed at the same time across a broad area. such a rock layer, termed a facies, when traced laterally represents a variety of depositional environments that formed at the same time across a broad area. such a rock layer, termed a facies, when traced vertically represents a variety of depositional environments that formed in a sequence over time.

What landform caused by water erosion and deposition is shown in the image?