Investors in industry that sought out more raw materials and new markets in the 1800s contributed to the rise of

Imperialism.

Step 1: Identify the time period and context. The question refers to the 1800s, a time when many industrialized nations were expanding their reach.

Step 2: Understand the actions described. The investors were seeking out more raw materials and new markets. This is a key characteristic of imperialism, where nations extend their power and influence through colonization, use of military force, or other means.

Step 3: Connect the actions to the concept. The search for raw materials and new markets often led nations to colonize other regions, thus spreading their economic and political control. This is the essence of imperialism.

So, investors in industry that sought out more raw materials and new markets in the 1800s contributed to the rise of imperialism.