TASK DEFINITION: In this task, you are given a paragraph, and your job is to generate comma-separated entities present in the given paragraph. Generate entities from a given passage in such a way that (i) they are present in the paragraph, (ii) they are non-duplicate, (iii) they underwent a state change during the process. Avoid creating entities that (i) aren't present in the process paragraph and (ii) aren't significant. 
PROBLEM: Acid rain makes waters acidic. Causes them to absorb aluminum from soil. The water runs off from the soil into lakes, streams, etc. Fish and their eggs die. Frogs and plants die. Insects and other wildlife die. The ecosystem is out of balance, causing further problems. 

SOLUTION: water ; acidic water ,aluminum ,fish and their eggs ,frogs and plants ,insects and other wildlife 

PROBLEM: Magma rises through surrounding rock. Gas bubbles form and expand, causing lots of pressure. This pressure pushes the magma through weak spots in the earth's surface,. Magma flows out as lava. This can happen slowly or in a huge explosion. 

SOLUTION: magma ,gas bubbles ,pressure ,lava 

PROBLEM: Water in the clouds becomes very cold. The cold water forms ice crystals. The ice crystals grow by absorbing surrounding water droplets. Form snowflakes. The snowflakes fall to the ground. 

SOLUTION:
water ,ice crystals ,snowflakes