They changed over time by finding the right ingredients such as iron, metal, or steel to forge different creations. They took so slowly because no one was discovered the things to make stone tools.
D. Pullman car was a train car. Standard time was used by railroads so trains would not crash into each other. Standard gauge was the size of
Tracks so any railroad could use it.
The correct answer is A. Activity
Explanation:
In sociology, there are different theoretical perspectives that aim at explaining the role of elderly people in society. In the case of activity theory, this theory states as people grew older their roles and activities change and elderly people need to replace old roles and activities with new ones to be actively involved in societies and be happy. Indeed this theory proposes older adults can age successfully if they preserve social interactions. This theory can be seen in the case presented as once the older woman retires she replaces old activities and roles for new ones just as swimming every day and serving on the Friends of the Library board that suggest this woman is aging successfully as she stays active and preserves social interactions although these are different from the ones he had before.
The answer is a decomposer
