4. Human migration due to industrialization changed many cities, such as Detroit and Chicago. Which of the following is the MOST direct result of this migration? the decrease in labor unions a drop in crime rates innovations in transportation the increase of urbanization

## Step 1<br />The question is asking for the most direct result of human migration due to industrialization in cities like Detroit and Chicago. The options provided are: the decrease in labor unions, a drop in crime rates, innovations in transportation, and the increase of urbanization.<br /><br />## Step 2<br />The first option, the decrease in labor unions, is not a direct result of human migration. Labor unions are more related to the working conditions and rights of workers, not directly to the migration of people.<br /><br />## Step 3<br />The second option, a drop in crime rates, is also not a direct result of human migration. Crime rates can be influenced by many factors, including economic conditions, social structures, and law enforcement, not just migration.<br /><br />## Step 4<br />The third option, innovations in transportation, is not a direct result of human migration. While industrialization often leads to advancements in transportation, these advancements are not a direct result of migration.<br /><br />## Step 5<br />The fourth option, the increase of urbanization, is the most direct result of human migration due to industrialization. As people move from rural areas to cities in search of work, the population of these cities increases, leading to urbanization.