An organism that gets its energy directly from the sun is called a photoautotroph.

Here's why:

* Photo- refers to light (specifically sunlight).

* Auto- means self.

* Troph- relates to nourishment or feeding.

So, photoautotrophs are organisms that can self-nourish using light energy from the sun. The most common example of photoautotrophs are plants, which use photosynthesis to convert sunlight into chemical energy.