This is a tricky one. The answer is true, because the near-destruction of smaller Native American tribes by the English settlers indirectly led to the consolidation of power among larger Native American confederacies.
As the English settlers expanded into the continent of North America and displaced indigenous populations, smaller Indian tribes were forced to band together into larger, more powerful confederacies in order to resist the European invaders. For example, the Iroquois Confederacy emerged in the 1500s as a result of conflict with the French and English settlers, and it became one of the most powerful tribes in North America.
So while the statement is technically true, it is important to note that it is a major oversimplification of a complex historical process that involved many factors, including immigration, colonization, and war.