Generate an overlapping word between the given two sentences. When you find the overlapping words, they don't have to match exactly, e.g., "survival" and "survive" are valid overlapping words. Little words like "the" or "of" don't count! You must generate significant words which are not the stop words.
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Question: Sentence1: Genetics is the study and application of principles of inheritance to plants and animals . 
Sentence2: Pedigrees are useful tools for studying Genetics.

Answer: Genetics


Question: Sentence1: Earthquakes are natural disasters. 
Sentence2: earthquakes can cause animals to leave an environment.

Answer: Earthquakes


Question: Sentence1: Algae have varied life cycles. 
Sentence2: Algae and many other aquatic plants are eaten by a variety of invertebrates and fish.

Answer:
Algae