Might be b I might be wrong
Answer: it protects against water loss, regulates gas exchange, secretes metabolic compounds, and (especially in roots) absorbs water and mineral nutrients.
Explanation:
Whereas, female offsprings inherit X chromosome ( from each parent). As per the question, family has Y linked disease that affects father. Thus, there will be 100% chances of inheriting this disease by the male offspring.
Both food chains and food webs contain plants and animals so it is not A.
Food chains separate by trophic level not food webs so it is not B
***Food chains show energy flow by each trophic level and food webs do not therefore it is C***