As is said in the problem, in Appleland you have 12 apple trees per acre (12 apple trees = 1 acre). To solve this question we must find how many acres are necessaries because there are 792 apple trees in Appleland as follows:
An ecological network is a representation of the biotic interactions in an ecosystem, in which species (nodes) are connected by pairwise interactions (links). These interactions can be trophic or symbiotic.