A) Which of the following is an observation about how migration can positively affect a location? (1 point)

Migrants may experience a loss of identity.
The addition of migrant workers creates additional tax revenue.
Large numbers of seasonal workers can create a labor surplus.
Migration may lead to an ageing population

The addition of migrant workers creates additional tax revenue.

B) Which of the following is a step that can be taken to reduce pollution from vehicles? (1 point)

Implementing stricter emissions standards for automobiles.
Increasing the number of cars on the road.
Reducing funding for public transportation.
Encouraging the use of fossil fuels for transportation.

To determine which of the following is an observation about how migration can positively affect a location, let's evaluate each option:

1) Migrants may experience a loss of identity: This option presents a negative consequence of migration rather than a positive observation.

2) The addition of migrant workers creates additional tax revenue: This option suggests that migration can have a positive impact by generating more tax revenue. It indicates that with the arrival of migrant workers, the location's economy may benefit from increased taxable income.

3) Large numbers of seasonal workers can create a labor surplus: This option states that a large influx of seasonal workers may result in a surplus of labor. While labor surplus may not be seen as a positive observation in all cases, it can be advantageous for certain industries where the demand for labor fluctuates seasonally.

4) Migration may lead to an aging population: This option highlights a potential negative consequence of migration, as an aging population may pose challenges for a location in terms of healthcare, social services, and economic productivity.

Based on the analysis above, option 2 - "The addition of migrant workers creates additional tax revenue" - is the observation that depicts how migration can positively affect a location.