4) How are the sections organized to help develop understanding?
(A) The sections list the history of other mass extinctions to help readers understand
what could happen.
(B) The sections outline the problems caused by a mass extinction and then show
possible solutions.
(C) The sections analyze the impact of an extinction event from the smallest living things
to the largest.
(D) The sections compare the effect of an extinction event on living and nonliving things.

It changes food into energy that the organism can use.

Mass is the amount of matter in an object.  weight is the measurement of the pull of gravity on an object.  say for example, you travel to the moon which has a different gravitational field compared to the gravitational field of earth. (gravitational fields: earth = 1, moon = 0.165)  now when you are on the moon, the pull of gravity on you is different than on the earth. and as weight is the measurement of the pull of gravity on an object, that means yes, your weight can and will change on the moon.  however, on the moon, on earth or even on jupiter, the amount of mass inside of you remains the same. meaning your physical mass remains constant.  in conclusion it is possible for your weight to change as your mass remains constant.