The answer is d. keep. Hope this helps!
Pretty sure it's the First and Third sentence.
Answer: He argued that observation and experimentation are the most important tools for understanding the natural world. ... It caused people to take a new, logical approach to scientific discovery based on experimentation and observation.
While Manoj is intelligent, I am less intelligent.
Without the proper equipment safety damage to the bone, muscle, and ligiments known as "Over Use Injuries" can occur