I think it's a pun (basically a joke that is related to a specific word, like its meaning or sound) - because it's wordplay about light vs heavy
Answer: I can help you just ask me the question
Explanation:
C is the answer hope it helped
Answer:
its d or the desire to fight for power is an instinct.
Explanation:
What it means is that he wouldn't have been able to get where he got if it hadn't been for the scientific achievements of his predecessors. If it hadn't been for these "giants" that enabled him to see so far, he wouldn't have been able to make all the discoveries that he did. For those coming after him, he was a giant that enabled them, and so laws and theories and scientific knowledge always increases based on the knowledge before it.