Given the question: You are presented with the question "Gravity causes what to be pulled down on Mars?" and the following answer choices: - space - living things - hydrogen and oxygen - massless objects - objects that have mass - fissures of hot, acidic water - nothingness - principals of aerodynamics Now knowing that gravity causes objects that have mass to be pulled down on a planet and another name for Mars is the Red Planet, choose the best answer.
The answer is:
objects that have mass