a) Caner;

UV rays can cause skin cancer as they damage the genetic material of the skin cells causing the cells to grow out of control.

b) Producer;

Pesticides enter the food chain at the producer level as plants are the producers which are fed with pesticides.

c) Goat (or any herbivore);

Herbivores feed on Producers; herbivores are in turn eaten by consumers.

d) Rabbit ;

Rabbits feed on Lettuce which are in turn eaten by Fox

e) Lion; Plants are eaten by Antelope and Antelope are eaten by carnivores (consumers)