Please read the following table in Markdown format and then answer the question according to the table. Table cells in one row are seperated by '|', and different rows are seperated by '
'.

Table:
|  | animal/plant |  | animal/plant |  | benefit |
| --- | --- | --- | --- | --- | --- |
| A(n) | flower; plant | relies on | insects; bees | for | pollination |
| A(n) | animal | relies on | plants | for | shelter |
| A(n) | human | relies on | plants; animals | for | food |
| A(n) | animal | relies on | plants | for | oxygen |
| A(n) | animal | relies on | plants; animals | for | food |
| A(n) | insect | relies on | insects; plants; animals | for | food |
Question:
Which element do plants exhale and animals inhale? Select the correct choice to answer the question or fill in the blank.
Choices:
(A) carbon dioxide
(B) oxygen
(C) helium
(D) nitrogen
Answer:
(B) oxygen