The figure shows two ways of rearing chickens for meat.
Figure: Two ways of rearing chickens for meat

Meat from chickens reared in system A is cheaper to buy than meat from chickens reared in system B.
Evaluate the use of system A rather than system B to rear chickens for meat.
Suggest one change the farmer could make to system A that would improve the welfare of the chickens.
42 exam-style questions on AQA GCSE Biology 7.5 Food production, covering 7.5.1 Factors affecting food security, 7.5.2 Farming techniques, 7.5.3 Sustainable fisheries, and 7.5.4 Role of biotechnology. Each one has a worked solution and a mark scheme showing where the marks go.