Bio-, which means "life" APEX:)
biodiesel = el biodiésel
Epidermis is the word that most likely means an outer layer of skin.
A word meaning a period of excess could be drought.
Dermatology is the Greek root word that is most likely to mean the study of skin. The word "derma" refers to skin, and "logy" refers to the study of something.
A vestment is an official or ceremonial robe.
antidote =]
Without seeing all of the choices given, it is impossible to say for certain. However, knowing Greek roots and Latin roots, it is likely that the word in question is either "monarchy," or "empire."
Bio-, which means "life"
investigate
"Philanthropy", from philia "affection" and anthropos "man".
Drought means a period of excessive dryness.
Topography investigate--(apex)