F.2 I.S. 急!!

Living cells use (e) oxygen to break down food and
release the (f) chemical [no other answers]
energy stored in the food.
The breaking down of food in cells
produces (g) carbon dioxide
and (h) water.

(g) & (h) may exchange with each other.

(f) must be "chemical" as it is the form of energy and
no other answers are accepted

HOPE I CAN HELP YOU ^_^

(e)oxygen
(f)chemical
(g)water
(h)carbon dioxide