Please HElp Which specific process in the light-dependent reactions produces oxygen and hydrogen ions?

the formation of NADPH
the production of ATP
the splitting of water
the excitation of electrons in photosytem I

One group of reptiles, characterized by the fossil ark metal x

Match each description to the appropriate biome. tropical savanna desert tropical rain forest taiga tundra has sparse vegetation and very cold temperatures located near the equator and contains trees that form dense canopy layers is very hot and dry, and has plants that need little water has cold winters, heavy snowfall and is dominated by conifers has warm temperatures and is dominated by grasses

2. given that most biochemical (other than coal) rocks react with hydrochloric acid, what does that tell you about organisms?