80% 2. What is population density?
80%
90%
A the number of organisms of a species in a particular area
B the area occupied by a particular species in an ecosystem
OC the total number of organisms of a particular species
OD the total number of organisms within a fixed area

A.

Population density is the total number of organisms of a specie in a particular/fixed area; 150 bees in a 150 meter/square... it's density is arguably 1 bee to one meter/square.

d. groundwater flows through the subsoil and deposits minerals.

not necessarily. higher fitness requires the organism to be reproductive successful. for example, an organism at age 10 with 15 offspring is much more fit than an organism at age 15 with only 5 offspring.