The statement that correctly assesses a way in which African countries can reduce the harmful impact of climate change is:
Governments can invest in seawalls and protect mangrove swamps to help prevent coastal flooding and erosion from rising sea levels.
This approach directly addresses the physical impacts of climate change, such as rising sea levels and coastal erosion, which are significant threats to many African nations. Investing in natural and infrastructural solutions can enhance resilience against climate-related disasters.