While doing fieldwork in Hawaii, you get the opportunity to witness firsthand a volcanic eruption. To get to the site of the eruption, you must hike a few miles over lava flows that erupted a few months earlier and are now cooled. You are walking on:

igenious rock

Explanation:

there are three types of rock sedimentary metomorphic and igenious, walking on lava that has cooled is igenious as igenious rocks are just lava that has cooled down

the answer is option c.

explanation:

recycled water alludes to the water that being utilized again after it already  used for farming purposes.   this kind of water frequently contains pharmaceutical gathering due to the compound compost that is utilized for the plants is consumed into the water.

question

which are human systems?

the amazon rain forest

the appalachian trail

the george washington bridge

the himalayas

the hoover dam

the north american free trade agreement