Preposition ends with a noun or a pronoun. Its called the " object with perpostion."
Answer:
he means he has responsibilities but we all have privileges as well
Speak about how the world has evolved through the topics of science and technology (separately)
Discuss the fact that 40 years ago computers weren't invented and now they are beyond the capacity of a human brain.
Discuss how science nowadays has been able to uncover mysteries of the earth as well as how science has created (in cooperation with technology) robots.
Basically discuss how it has changed over the years, the importance of technology in the changing world as well as science.
Notice: All nouns have to be Capitalized. And when starting a sentence, the first letter has to be a capital letter.
Hence, the right choice have to be D) Our favorite activities at Camp Lake Tahoma were Archery and Kayaking.
