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.

Q: Sentence1: Basically, heat is energy. 
Sentence2: Head hair is especially important in preventing energy loss from the body.

A: energy
****
Q: Sentence1: Crops are plants that are grown for food or other uses. 
Sentence2: insects destroy plants.

A: plants
****
Q: Sentence1: Roots grow in length and width from primary and secondary meristem. 
Sentence2: Roots grow in length and width from both roots and shoots.

A:
Roots
****