1)

danny and his sister minnie decided to go tubing over the summer break in a nearby river. when they arrived they saw a location where someone had dumped some household trash into the river. how does dumping waste into rivers pose a threat to the ocean?
a) rivers have no connection to oceans so there is no threat.
b) rivers flow into oceans and will carry the waste with them.
c) animals in the river will move to the ocean to escape the waste.
d) the same people who dump waste in rivers will also place waste in the ocean.