Is pollen on male or female flower?

Which of the following statements best describes the relationship between the environment and human health? a. the environment is the only factor that affects human health. b. many aspects of the environment can have an impact on human health. c. human health is impacted by changes in climate. d. the environment has no impact on human health. select the best answer from the choices provided

Idon’t know the answer and i’ve been stuck on it for a while now skskskskks

Why do we perceive objects as retaining their brightness under different lighting levels?