Two-thirds of annual surface runoff is? a. supplied by melting ice and snow

b. identified as reliable surface runoff

c. available for human use

d. used for watering crops

e. lost in seasonal floods​

Where’s the graph 0.0

An ecosystem is in a certain area and includes living and non living plus there is weather conditions and a biome is a large amount of area with similar climate.so ecosystem is based on weather and biome is based on the average climate 

Idon’t know i’m just trying to get points to make me look smawt