In this task, we ask you to rewrite a sentence in simple English without changing its general meaning. Essentially, you want to make the sentence easier to read by using simpler words, utilizing more straightforward sentence structures, and omitting non-essential information etc.

Q: Supply depots are a type of military installation used by militaries to store battlefield supplies temporarily on or near the front lines until they can be distributed to military units .

A: A Supply depot is a type of military installation used to store military supplies .
****
Q: Surfing is a surface water sport in which the wave rider , referred to as a surfer , rides on the forward or face of a moving wave , which usually carries the surfer towards the shore .

A: The surfer uses their surfboard to catch a wave and ride in towards the shore .
****
Q: In humans , the pigmentation of the iris varies from light brown to black , depending on the concentration of melanin in the iris pigment epithelium ( located on the back of the iris ) , the melanin content within the iris stroma ( located at the front of the iris ) , and the cellular density of the stroma .

A:
In humans , the pigment of the iris varies from light brown to black .
****