Can someone help please

the mutation they are talking about deals with genes/dna

Explanation:

they show one person (j) who does not have the mutation and therefore does not have the syndrome h

then they show person (k) who has a mutation and therefore had syndrome h

look carefully at the letters on the lines. they represent the DNA in people and correlate to each other

(I hope this helped a little bit and I may he completely wrong but I think I'm mostly right)

any abiotic or biotic factor in an ecosystem that causes a population's size to slow or decrease is a limiting factor.