Which describes one effect of the sea-level change that occurred during the last ice age? a flooding that swept across the land due to regression
b buildup of salt in freshwater areas due to transgression
c extinction of organisms in shallow waters due to regression
d erosion of shorelines and other coastal areas due to transgression

What is an animal that lives by preying on other animals

Recent research by marine biologists suggests that bottlenose dolphins have names for themselves. scientists played sounds they had identified as the names of particular dolphins, putting them through a synthesizer so that they did not sound like the voices of particular dolphins. the researchers found that dolphins would respond to the names of other dolphins that they were related to or associated with, but they ignored the names of strangers. this discovery suggests a much greater degree of self-awareness in aquatic mammals than was previously suspected. if this research holds up, what does it suggest about dolphins?

What is the following best defines climate?