I need the answer this is quizzes and it’s select all apply pls say the correct the answer

How would having more railroad tracks be advantageous during a war

Which of the following is an example of proximodistal pattern of growth? (a) abbey learning to sit first before learning to stand or crawl (b) alex learning to move his eyes before learning his first words (c) colin learning to stare at moving objects before trying to touch them with his hands (d) polly learning to grab the objects with her whole hands before learning to pick them up with her fingers

Which factors are examples of how technology may have affected the great migration apex