I need to know how to do this, please help !!1

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..

Are the earth's ocean floor and continents the same age geologically? why or why not?

_tissues respond quickly to outside stimuli a) epithelia b)nervous c)muscular d)muscular and nervous