Which two south american countries are landlocked? venezuela paraguay ecuador bolivia

Seed plants that lived during the carboniferous impact life on earth today because a. they are the ancestors of all plant life on earth. b. their remains formed coal, which is an important resource. c. they produced fossils that are used to date many geologic events. d. their presence caused oxygen levels to drop, allowing animals to evolve.

Describe how ocean currents can affect a moving object ❕❕❕

In russia which of these challenges affects the transportation of both petroleum products and other goods?