Because it was a close water source where they could grow food instead of chase there food
The correct answer is C. About 10 kilograms.
Explanation
Mass is a quantity commonly used in areas such as physics and chemistry that expresses the amount of matter that an object has. The unit of measurement for mass is the kilogram (kg), as well as its derived units such as the gram, milligram, among others. However, it should not be confused even with weight (which is used to express the intensity with which a body is attracted by a gravitational field). On the other hand, a bicycle is an artifact or means of transport that uses a system of gears to move. Bicycles generally have a mass of 10kg, so the correct answer is C. About 10 kilograms.
Answer: The city council should careful evaluate the benefits of reduced fatalities against the costs of the light and the extra time that the drivers will spend waiting for a green light
Explanation: Installing the traffic light which could reduce the fatalities caused on the highway is a good development. However, there are more factors to be considered when embarking on projects of such nature. The projected cost of a project is just as important as the project to itself. It project cost is so high such that the community does not have the required fund to cater for it, then the project should be delayed or altered for a subordinate solution until funds become available.
The extra time require to wait for a green light, if the commuters cannot be patient enough to follow traffic signals, the effort won't reap the required outcome.