Why do you think a trench formed at this plate boundary? please hel

According to piaget, children have acquired the cognitive skill of conservation when they're able to a. understand that six ounces of liquid in a jar and six ounces in an elongated tube are equal. b. understand the viewpoint of other people. c. relate objects around them to their own needs. d. realize that the term heavy describes an object one way and the term big describes it another way. it is not b nor c. did this 2 x wrong..

Ais a landform that is formed at the mouth of a river from the deposition of sediment carried by the river as the water flows.

List five ways we are indebted to phytoplankton