2. Sharks are the top predator in a marine ecosystem. Sharks help to maintain a balance in the population of smaller organisms. If the shark's
population were to decrease, the smaller organisms would increase greatly,
interrupting the food web. Which of the following relationships is MOST
similar to the relationship between the shark and the marine ecosystem?
O A frog eats flies and lizards in a swamp ecosystem
Leaf-cutter ants eat grass in a prairie ecosystem
A wolf eats small mammals in a forest ecosystem
O A lizard eats a cricket in a desert ecosystem

For cyclohexane compounds drawn in a chair conformation:   -axial bonds are vertical  -equatorial bonds are parallel to two bonds within the ring.  thus, as i assume the chair conformation is drawn:   -the x group is in an axial position, as are the five other vertical bonds.  -three axial bonds are on the top face of the ring  -the other three axial bonds are on the bottom face  the position of the second substituent on each ring carbon is equatorial.  gauche groups must be on an adjacent carbon such as carbon 6 and carbon 2, and also gauche groups are rotated by 60 degrees relative to each other.  drawing the newman projections for c1–c2 and c1–c6 aids in visualizing the groups that are gauche to the y group on c1.  click this link and watch some academic videos that may you more understand the topic 

Ibelieve it is b. proton.hope my answer has you : )

H+ + cn– + li+ + oh– mc001-4.jpg li+ + cn– + h2o