Answer:
Water, plants, animals
Explanation:
The options you were given are the following:
When we're unsure about what a word means, the context it is used in is very important. It can help us partially or fully determine the meaning of a word.
Here, we have the word undergrowth, which refers to small trees, bushes, ferns, and other plants that grow beneath taller trees in a forest. Other words that can help us determine its meaning (called context clues) are water, plants, and animals. Water, plants, and animals are all located on the forest floor, where the undergrowth can be found as well.