What is the role of advertisement in your life as a student​

What is the relation ship between structure and function in an organism

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..

Which of the following particles always has a positive charge? a. electronb. neutron c. proton d. ion