What is a potential benefit of using alley cropping?

slowing soil erosion
increasing cash crop yields
decreasing labor costs
shifting agriculture to new areas

The correct option is B. Increasing cash crop yields.

Explanation:

Alley cropping can be described as an effective agricultural technique in which crops are grown between rows of trees at each side. This techniques protect the crop plants from being destroyed and increases the yield of crops. Alley cropping is a technique that is used by various farmers to increase their income as crop production is improved.

The main reason that this technique is effective is that the fertility of the soil enhances by this technique.

1) gene flow

- it is described as the transfer of genes from one population to another population so that frequency of gene is increased.

-a zebra migrates to join a different herd of zebras.

2) natural selection

- a mechanism of evolutionary change in which individuals with advantageous traits survive and reproduce whereas the others ( those that can not adapt) eliminate from the population.

-competition for sunlight leads to taller trees.

3) mutation

- permanent change in the nucleotide sequence of dna ( genetic material) that could have harmful or useful consequences.

-the dna of a snake changes to make its venom stronger.

4) genetic drift - it is a random phenomenon ( that occurs by chance such as fire) that results in change in the gene frequency in a small population.    

-a grassfire randomly sweeps through a population of buffalo and kills most of the animals.

explanation: