Why on earth am I so tired and void of energy although I slept well

What is the broadest level of classification of life

Name one similarity and one difference between the morphology of a brachiopod and a bivalve

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..