Hi there!! As a warning this answer might be wrong so don't fully trust me!!
Rampant Exploitation - (negative) exploiting natural resources did serious damage to their land and economy.
Cultural Destruction - (negative) imperial rule destroyed land, weakened family and tribal ties, led to forced labour, and abused african rights.
Physical Improvements - (positive and negative) improved medical care and nutrition but led to population explosion. placed strain on limited resources.
Agricultural Change - (positive) changes in practices led to increased production.
Economic Transformations - (positive and negative) barter economy to currency system but led to gaps in wealth.
Hope this helps!!! <3
