Answer: They contain substances/substrates in specific ways that heighten the chances of the chemicals reacting with each other
Explanation:
i took a similar quiz
My best guess would be "asexual" (press "thanks" if im right to let me know)
A cow will eat grass in a field, the grass is the plant and the plant eater is the cow. (Srry if this is not what your looking for)
Density = mass / volume
Plug in the values for mass and volume
Density = 1,800g / 300cm^3
Density = 6 g/cm^3