Please help me in Enviromental Science 1. Which of the following groups of people most likely represents a Snapshot in time of a human society that existed 12,000 years ago? a. 75 adults,10 children
b. 150 adults, 30 children
c. 300 adults, 100 children
d. 50 adults, 20 children

2. Which of the following are considered disadvantages of an agricultural society?
I-Dependence on a few crops
II- Greater vulnerability to natural events
III- Need for intense physical labor
a. I only
b. I and II
c. III only
d. I and III
e. I, II, and III

3.A significant change that occurred during the industrial revolution was the consolidation of manufacturing into a few large centers that produced nearly all the goods for the whole nation. This system cannot have been successful without which of the following advances?
a. The invention of the sewing machine
b. Development of genetically modified crops c. Discovery of PBCs for use as industrial coolants
d. Improvements in railroad and see ship transportation

4. The industrial revolution was characterized by which of the following changes in energy use and sources?
a. A shift from energy intensive process to highly energy efficient processes
b. A shift from Human and animal energy to energy from other sources
c. A shift from primarily coal-based energy to primarily water-based energy
d. A shift from natural energy sources to artificial energy sources
e. A shift from highly polluting energy sources to cleaner energy sources