Before sarah can learn to read, she must learn many skills, such as how to move her eyes from top to bottom and from left to right on the page. learning this and other skills before reading is an example of

Sequenced steps in growth and development.

Explanation:

According to my research on studies conducted by various develop-mentalists, I can say that based on the information provided within the question this is an example of Sequenced steps in growth and development. These are certain steps in a child's development that must be taken before learning other skills or steps.

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a factory opens that mass-produces light bulbs.

explanation:

not sure if that's an answer to your questions but this is an example! : )