You set out to observe the symbiotic relationship between a species of orchid and a species of fly. This species of orchid is only pollinated by this one species of fly, and the flies seem to prefer that orchid over any other flower for its nectar supply. Identify and describe two reasons for the proximate causation for the species-specific preference of this fly. Select one of the reasons and make a prediction on the outcome on species-specific preference of the fly. Justify your prediction with evidence.

Match each law or principle to its description. 1. law of original horizontality sediment continues to spread in a flat plane until it hits an edge or runs out of material. 2. law of superposition the youngest strata are at the top and the oldest are at the bottom. 3. law of original lateral continuity sediment gets pulled down by gravity in a horizontal and flat layer. 4. law of cross-cutting or intrusive relationships if there is a fracture or intrusive feature seen in rock strata, it is younger than the rock strata.