Which of the following investigations is an example of the study of an abiotic factor? see concept 52.1 (page 1167) which of the following investigations is an example of the study of an abiotic factor? see concept 52.1 (page 1167) investigating how an elk population competes for food identifying food sources for an egret population investigating how the amount of annual precipitation affects the distribution of a tree species observing interactions among various organisms in a rainforest canopy the relationship between finch beak size and food availability on two different galapagos islands