Continental drift was a theory that described how regions shift location on Earth's surface. Set forth in 1912 by Alfred Wegener, a geophysicist, and meteorologist, continental drift also described why look-alike animal and flower fossils, and comparable rock configurations, are found on several continents.
Seed dispersal is the transfer or transport of grains apart from the parent plant.So the seed is dispersed through water from Switzerland to Montana through the flow of water that seed is dispersed so far.
Biotic factor refers to the living component of ecosystem so that will be snail and insects as they are living. Abiotic refers to the non living components of ecosystem that include water.