to release gases to release water to absorb energy to absorb nutrients
I am hesitating between 4 options to answer the following question, which option should I choose?
Question: Plants on hills keep dirt in place during a rain storm. Plant roots grow into the dirt and keep the dirt from moving. Why do roots grow into the dirt?
Possibilities:
- to release gases
- to release water
- to absorb energy
- to absorb nutrients

to absorb nutrients