Final answer:
The toxicity of a substance is highly dependent on its form and where it is present in the environment.
Step-by-step explanation:
The most important factor in the toxicity of a substance is the route it enters our bodies. Different routes of exposure, such as inhalation, ingestion, or skin contact, can result in different levels of toxicity. For example, a chemical that is toxic when inhaled may not be as toxic when ingested.
The statement that if a substance is toxic, its toxicity is highly dependent on its form and where it is present in the environment is also true. Different forms of a toxic substance, such as solid, liquid, or gas, can have different levels of toxicity and different effects on the environment and living organisms.
Therefore, the correct statement is that if a substance is toxic, its toxicity is highly dependent on its form and where it is present in the environment.