In 1980, Mount St. Helens erupted in Washington State. Hot air and debris destroyed the surrounding forest. Since then, scientists have been studying this area and are observing the ecological succession that is occurring.

Which graph shows what scientists have most likely observed about the species diversity in the area since 1980?
Species Diversity
Species Diversity
Time (years)
Time (years)
ecies Diversity
ecies Diversity

Helens' vicitims died by asphyxiation from inhaling hot volcanic ash, and some by thermal and other injuries. The lateral blast, debris avalanche, mudflows, and flooding caused extensive damage to land and civil works. All buildings and related manmade structures in the vicinity of Spirit Lake were buried. So it would be the graph that goes down.

Explanation:

thrombocytopenia, which is a deficiency in blood platelets, can cause bleeding and bruising in the dermis similar to senile purpura. other possible causes include: exposure to ultraviolet rays and aging skin are common causes of senile purpura. senile purpura may also be a sign of collagen loss in the skin and bones.

the law of original horizontality explains:   why rocks appear in layers. correct answer: b the law suggests that all rock layers are originally laid down (deposited) horizontally and can later be deformed.   the principle is used by geologists to make assumptions about the relative ages of sedimentary rocks.