The two main factors:
1. Precipitation
2. Temperature
It would be B. Less force is needed to move up the ramp
Explanation:
amphibians have smooth, sticky wet and highly porous skin to perform various functions.
reptiles have a dry, hard and scaly skin, which guards them in harsh conditions.
amphibians lay their eggs in water and cover them with gel.
reptiles lay their eggs on land and have a hard protective shell.
