In this example sculpture in the round, entitled, David, the figure (David) is positioned so that he is standing with most of its weight on one foot. In sculpture, this style is referred to as _. a. staging c. silhouette b. contrapposto d. modeling

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She was one of the world's first female heads of state.

True blindness may be caused by trauma to the eye, severe conjunctivitis due to  ibr (infectious bovine rhinoceros) or pink eye or other infections, leptospirosis, lead poisoning, selenium toxicity, fungal infections, vitamin a  deficiencies, rabies, vitamin b12 deficiency, neoplastic of the orbit or  conjunctiva, cataracts, congenital malformations, etc.