carbon

"The teacher's explanation had a clear reference to the textbook. "

"The waters of the lake were transparent until the factory dumped waste there."

"The atmosphere was thick with the smell of popcorn, as the kids gathered for the movie night. "

"The box containing my old toys was stored in the attic. "

"The water from the well was surprisingly colourless, almost like air. "

"The computer technician fixed the broken printer in the school library. "

"This flow chart represents the assignment of tasks in our committee."

"A CPU is a component of a computer."

"to contribute articles to a journal"

"The jeweler carefully inspected each crystalline before setting it in the ring. "

"The electricity bill was unusually high this month, likely due to the many electronics running in the house. "

"The presentation about the new school rules was very clear and easy to understand. "