manganese

"The school science project involved identifying different rocks based on the minerals they contained, like quartz and feldspar. "

"The combination of soft music and warm lighting created a relaxing atmosphere in the living room. "

"The school's computer network is a complex of interconnected systems, linking classrooms, libraries, and administration offices. "

"$ is the symbol for dollars in the US and some other countries."

"Letters are the elements of written language."

"The new bicycle's metallic silver paint gleamed in the sunlight. "

"The birds had built an amazing structure out of sticks and various discarded items."

"My laptop needs a new battery; it only lasts for a few hours now. "

"My grandfather was a skilled industrial during the 1950s. "

"strengthen a muscle"

"The scientist studied the chemical composition of the soil sample. "

"The widget making machine is being used for production now."