How would I fill out this dichotomous key??? (5th time asking, please answer)

The eruption of a nearby volcano causes a prairie ecosystem to receive a lot less sunlight.which of these is the most likely effect on the ecosystem? a-an increase in biodiversity. b-an increase in immigration to the area. c-a decrease in available water. d-a decrease in plant growth.

What drives an advertising campaign?

Albinism is an inherited genetic disorder. explain what it is meant by inherited genetic disorder