Urbanization may actually have a positive effect on existing rural and natural landscapes by contributing to the stabilization and improvement of natural living conditions.

Yes, that statement is true.

Explanation:

All the lands that people use to lived on today initially come from wild environment with uneven terrain and dangers such as wild beasts.

When behind done in a controlled way, urbanization can actually bring positive results by bringing in people who will slowly transform the terrain into livable neighborhood and eliminating the threat that can endanger the life of humans around it. In the long run, it also will boost the economy in that place due to the availability of capital and labors.

The problem only occurs if the urbanization is being done by over-exploiting the environment around it  ( such as cutting down too many trees to provide land)

explanation:

with the profits from the european sales, merchants purchased europe's manufactured  goods, including tools and weapons. then the merchants shipped those manufactured  goods, along with the  american  sugar and rum, to west africa where they were bartered for  slaves.

i would say b. research typically uses a variety of sources