What does it mean when an author is said to be anonymous?

The vocabulary word meaning causing destruction isrevenueruinousrepair

All of the following changes typically happened in colonies as a result of imperialism, except: a. cultural practices were outlawed. b. they became more economically self-sufficient. c. european nations built modern infrastructure, including railways. d. the european language became the language of government and education.

What event ultimately started world war 2 and ended britain and frances attempt to prevent war?