literally everyone: haha memes on brainy go B

The graph shows the populations of two species over time. which type of symbiotic relationship does the graph represent? a. commensal b. mutualistic c. parasitic d. parent-offspring e. predator-prey

Scientists observed a rock stratum with fossil. if mollusks evolved before arthropod, where will their fossils be found.

Land is to arable ; river is a, navigable b, shallow c, presumsor d, water