Which of the following best describes an autotroph? A) An organism that consumes other organisms for energy B) An organism that relies on its environment for food C) An organism that produces its own food using sunlight D) An organism that cannot respond to stimuli

## Step 1<br />The term "autotroph" refers to organisms that can produce their own food using inorganic substances and energy from the environment. This process is typically done through photosynthesis, where they use sunlight, or through chemosynthesis, where they use chemical energy.<br /><br />## Step 2<br />Option A describes a heterotroph, which is an organism that consumes other organisms for energy.<br /><br />## Step 3<br />Option B is a general description of an organism that relies on its environment for food, which could include both autotrophs and heterotrophs.<br /><br />## Step 4<br />Option D describes an organism that cannot respond to stimuli, which is unrelated to the concept of autotrophy.<br /><br />## Step 5<br />Therefore, the best description of an autotroph is given by option C, which states that an autotroph is an organism that produces its own food using sunlight.