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The graph refers to a captive population of animals. For each month of a consecutive 11-month period, it depicts the number of animals that died and the number of animals that were born. These were the only population changes; no animals joined the population from outside, and no animals (except those that died and were removed) left the population.
Based on the information provided, select from each drop-down menu the option that creates the most accurate statement.
| Text Component | Extracted Text | Interpretation |
|---|---|---|
| Subject | captive population of animals | Population in a closed environment (e.g., zoo, sanctuary) |
| Time Frame | consecutive 11-month period | Data spans 11 months with no gaps |
| Data Presented | number of animals that died and number of animals that were born | Tracks births and deaths each month |
| Population Change Constraints | These were the only population changes; no animals joined the population | Only births and deaths affect population size; fully closed group |
| Exit Restriction | no animals (except those that died and were removed) left the population | Animals only leave by dying; no external removals |
| Chart Feature | Details | Interpretation |
|---|---|---|
| Chart Type | Line chart, two series: died (blue, filled) and born (black) | Comparison of deaths and births over 11 months |
| X-axis | Months 1–11 | Shows each month during the study |
| Y-axis | Number of animals (0 to 160, increments of 20) | Deaths reach up to 136, births up to 60 |
| 'Died' Data Series | Blue line, filled circles, 10–136 deaths per month | Deaths fluctuate, sometimes spike |
| 'Born' Data Series | Black line, open circles, 0–60 births per month | Births lower and steadier than deaths |
| Visual Relationship | Deaths line always above births, widest in months 2 and 4 | Deaths always exceed births; gap is sometimes large |
Deaths outnumbered births each month, leading to a steady population decline. Over 11 months, there were 635 deaths and 312 births (a net loss of 323 animals). Month 9 had zero births and low deaths, making it especially notable. Death counts were highly variable (from 10 to 136), while births stayed more stable (0 to 60 monthly). The largest gaps between deaths and births happened in months 2 and 4.
At the end of the 11-month period, the number of animals in the population was [BLANK] the number of animals in the population at the beginning of the period.
The monthly totals of births and deaths resulted in a net population increase in [BLANK] of the months.
A quick visual comparison of the deaths and births lines in the chart shows that deaths always outnumber births each month, so the total population always decreases (less than at the end), and there are no months of net increase (answer: none).
The two blanks are independent: one asks about the total net change over the period (blank 1), the other about monthly changes (blank 2). You can answer each without needing the answer to the other.