Answer/Explanation:
1. Food and water are examples of important resources for an animal. If these resources are low in availability that means the organism is presented from carrying out its normal tasks due to lack of proper nourishment. E.g. hunting, mating, caring for offspring, as well as bodily functions that affect reproduction and survival like fighting infection, carrying offspring via pregnancy etc.
Therefore, lack of food and proper nutrition reduces the fitness of the population, reducing population growth. In contrast, abundant food and water means the population can thrive, aiding reproduction and population growth
2. Food is not a limiting factor for plants. This is because they are able to make their own food by photosynthesis. To do this, they use light energy from the sun to convert carbon dioxide and water into sugar. That means they do not need to rely on external sources of food.