instruction:
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. 
question:
Several types of gases form in the atmosphere. May come from different sources. The gases remain trapped in the atmosphere. Through the suns light the gases hold in heat and energy. Trap them in our atmosphere. The earth may become warmer this way. 
answer:
several types of gases ,atmosphere ,earth ,heat ,energy 


question:
Animals pull a fruit off a plant or pick a fruit up from the ground. Animals eat the fruit. Animals drop some seeds onto the ground. Animals eat some seeds. The seeds are in the animal's waste. The waste goes onto the ground. There are seeds on the ground in different areas away from the plant. 
answer:
fruit ,seeds ,waste 


question:
Animals and plants die in soft soil or mud. Sediment builds up over the remains. The remains decompose, leaving only trace amounts. The remaining parts over the years are replaced with mineral. A fossil is formed. 
answer:

animals ,plants ,sediment ,remains ,mineral ,fossil 


