Dr. o'brien is a physician who specializes in administering anesthetic agents. she is a/an .

Dr. O’ Brien who is a physician that has specialization of administering anesthetic agents is called to be an anesthesiologist. An anesthesiologists are physicians who have given physical training in having to administer anesthetic agents to patients that are required to be given with these types of substance.

c

explanation:

1: most common garden plants prefer loam — soils with a balance of different-sized mineral particles (approximately 40% sand, 40% silt, and 20% clay) with ample organic matter and pore space. however, some plants grow better in sandy soils, while others are well-adapted to clay soils.

2: available water capacity is the maximum amount of plant available water a soil can provide. it is an indicator of a soil's ability to retain water and make it sufficiently available for plant use. available water capacity is the water held in soil between its field capacity and permanent wilting point.

3: it is the same for all living things (plants and animals). it also includes very tiny organisms that our eyes cannot see. they are known as microorganisms, and include viruses, bacteria and fungi.