lungs

"It is difficult to provide for my family working on minimum wage."

"The water bottle's capacity is 500 milliliters. "

"My uncle ran in the city marathon last weekend. "

"The government has complete control over the situation."

"supply and demand"

"The school's science fair featured several different biological specimens. "

"The runner was breathing heavily after the long race. "

"The city council plans to develop the parklands behind the school to create a safe space for children to play. "

"Simple Example: "Humans, dogs, and fish are all examples of vertebrates because they have a backbone." "

"After we oxygenated the river, the fish returned."

"Sentence: Completing the marathon required a lot of physical exertion. "

"The teacher told us that the next exercise is to write an essay."