Detailed Instructions: 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.
See one example below:
Problem: Sentence1: pesticides cause pollution. 
Sentence2: pollution can harm animals.
Solution: pollution.
Explanation: The word "pollution" is common to Sentence1 and Sentence2. So, it's a good answer.

Problem: Sentence1: seasons cause change to the environment. 
Sentence2: seasons cause change to native habitats.
Solution:
cause