Which of these was used as a model service during the development of twitter?
oa. txtmob
ob. tumblr
oc. foursquare
od. reddit

During the late 19th century, russia's settlement and development of siberia was made possible by the invention of the

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

According to the aztec history, how did the aztecs know where to build their new city of tenochtitlan? why was this a good location?