1) The average weight of Breed A is (10 + 8 + 7 + 10 + 9 + 9 + 10 + 9) / 8 = 8.875 pounds. The average weight of Breed B is (10 + 12 + 14 + 13 + 10 + 15 + 11 + 12) / 8 = 12.25 pounds.

2) Factors that could contribute to the different weights seen within breeds include genetics, diet, exercise, and overall health of the rabbits. Different breeds may have different natural body sizes and shapes, which could affect their weight range. Additionally, individual rabbits within breeds may have varying diets and levels of physical activity, leading to differing weights.

3) To track and find the growth rate of the two rabbit breeds during an investigation, you could regularly weigh the rabbits at set intervals (e.g. weekly or monthly) and record their weights in a spreadsheet. By plotting the weights over time, you can calculate the rate of growth for each rabbit breed. You could also monitor and compare other factors such as diet, exercise, and any health issues that may impact their growth rates.

4) To determine the significance of the difference in weight between the two rabbit breeds, you could conduct a statistical analysis such as a t-test to compare the means of the two groups. This analysis will help you determine if the difference in weight between the two breeds is statistically significant or if it could have occurred by random chance. Additionally, you could look for any patterns or trends in the data that could explain the differences in weight between the two breeds.

5) To present your findings, you could create visualizations such as bar graphs or line graphs to show the average weights of each breed over time. You could also create tables to display the average weights, growth rates, and any relevant statistical analysis results. Additionally, you could write a report summarizing your findings, discussing the factors that may contribute to the differences in weight between the two breeds, and suggesting potential areas for further research.