I nad healp :/ I will give you some cimmanon test cranch

liquid water and carbon also known as source of energy

HERE IS YOUR ANSWER ,

ITS OPT B)

  BECUASE IF EARTH GOES FAR AWAY FROM THE SUN , THEN WE WILL ALL FROZE TO DEATH AS THE TEMPERATURE WILL DECREASE

                                                   OR

IF THE EARTH GOES TOO CLOSE TO THE SUN , THEN OFCOURSE , WE WILL ALL BURN TO DEAD AS THE TEMPERATURE WILL INCREASE .

 EITHER WAYS DEATH IS SURE , SO OPT B)

answer; ///(b) it is composed of four protein chains and four heme groups;

answer: 21

step-by-step explanation:

divide 630 by 30. 30 goes into 630 21 times