Answer:

According to blank slate theory, the mind is completely blank at birth. From there, education, environment, and experiences – which are external, as well as material and/or immaterial – shape the child's process of development. This leaves a lasting effect on who they become.
Answer:
He had been the oldest man
Explanation:
Answer: 1.The first part was unnecessary and the second part had words that were redundant
2. The extra words were deleted. There were redundancy issues.
Explanation:
1. The first part was unnecessary, since it was transitional phrases. The second part had words that were redundant. For example, you don't need the re in front of duplicate and with the word again. Or office in government with voting,
2. The extra words were deleted. There were redundancy issues. The motto less is more pertains to this sentence.