5. species with limited resources usually exhibit a(n) growth curve

The correct answer is: Species with limited resources usually exhibit a logistic  growth curve

Explanation:

In ecology, logistic growth refers to the phenomenon where the growth rate of a population decreases as the population reaches its carrying capacity (the number individuals that an environment can support without facing degradation). To put it simply, when a certain species has limited resources available to them, as they reach their carrying capacity, the population of that species will decrease due to death caused by lack of resources for consumption. The attachment shows what logistic growth looks like when plotted on a graph.

the last one: artificial selection/genetic engineering

plant breeding is modifying the genetic composition of the plant - but this isn't cloning (which is specifically introducing a gene into a genome). but you are artificially selecting for the phenotype that you want.

the second one is literally genetic engineering - the gene would have been cloned first and then inserted or genetically engineered into the new plant cell (the cotton).