A physical feature, such as an ocean, which hinders migration is an example of - an environmental incentive.
- an environmental push factor
- a forced migration.
- an intervening obstacle.
- a cultural pull factor

lets get this bread mom

an organism's phenotype is the  form of a trait  that it  displays. for  flowercolor, a pea  plant  can  display  a phenotype of purple or white flowers. an organism's  genotype  is the alleles of a gene it contains. based on his data, mendel concluded that a phenotype can be  determined  by more than one  genotype.