An example of a skeletal muscle working occurs when a person a. perspires heavily b. digests food c. takes a breath d. stands up

D. stands up because your bones gives you the energy to move.

definitely when a person stands up

the correct choice is a .

do not post any more test or exam questions on

answer;

d. are made mostly of liquid

explanation;

-the general   composition and structure planets includes; they have a thick gas and liquid layer covering a small,solid core. mostly the gases are hydrogen and helium atmosphere and layers of liquid hydrogen. for instance neptune and uranus are examples of the outer planets, they have a core covered by ice and ammonia.

-neptune's atmosphere is hydrogen and helium with a bit of methane so there is no oxygen to breath and the interior is made up of frozen water and ammonia with a rock and iron core. thus, there is no liquid water or solid surface to survive.