Why and with what result was there imperial growth in the last 25 years of the 19th century

To expand the rule and influence.

Explanation:

Imperial growth in the last 25 years of the 19th century was in order to expand  the influence and rule on other countries for its own benefit. The result of imperial growth is the competition of developed countries with each other in the field of economy and force power and at the end this imperial growth is the cause of war. Due to imperialism, big war were fought in Asia by USA and USSR.

b) the importance and limits of political power.