nitrous

"My dad installed a new security system in our house yesterday. "

"The extraction of the wisdom teeth was a necessary procedure for the student. "

"Many different vehicles, like cars, buses, and bicycles, travel on the road to school. "

"Many medications are derivatives of natural substances found in plants or fungi. "

"The science teacher conducted an experiment to demonstrate how plants grow in different types of soil. "

"My sister is very helpful, especially when it comes to organizing things. "

"The student's performance on the math test corresponded to the level of effort she put in during the week. "

"He listened carefully to his mother's concerns, feeling sorrowful about her disappointment. "

"The mechanic fixed the broken bicycle chain. "

"I distinctly remember my mother telling me to wear a jacket. "

"Please relate the circumstances of your journey here today."

"the performance of an undertaking or a duty"