heavy metals threaten some forms of life. heavy metals will increase available resources. exposure to heavy metals causes healthy mutations. mining for heavy metals causes environmental stability.
I am hesitating between 4 options to answer the following question, which option should I choose?
Question: Scientists are concerned about the presence of heavy metals like lead and mercury in the environment because
Possibilities:
- heavy metals threaten some forms of life.
- heavy metals will increase available resources.
- exposure to heavy metals causes healthy mutations.
- mining for heavy metals causes environmental stability.

heavy metals threaten some forms of life.