What does a model of the carbon cycle show? The amount of Earth’s carbon increases.

The amount of Earth’s carbon is constant.

The amount of Earth’s carbon decreases.

The amount of Earth’s carbon cannot be determined.

i think a) betsy can donate only blood to mark is correct because, mark and betsy have the same blood type. whereas nobody else has b+ blood so betsy can't donate to them.

hi i’m going crazy about going tomorrow and i’ll tell you what i’m doing and i wanna is a way ya

yes we can.   a lady urinates from her urethra.