\begin{tabular}{|l|l|l|}
\hline
Flock X & Flock Y & Flock Z \\
\hline
123 & 99 & 78 \\
\hline
& & \\
\hline
& & [tex]$\square$[/tex] \\
\hline
& & \\
\hline
\end{tabular}



Answer :

Certainly! Let's understand the solution in detail by analyzing the given table and filling in the missing values:

1. Identify Flock Sizes:
- Flock X consists of 123 birds.
- Flock Y consists of 99 birds.
- Flock Z consists of 78 birds.

Given these values:
```
\begin{tabular}{|l|l|l|}
\hline
Flock X & Flock Y & Flock Z \\
\hline
123 & 99 & 78 \\
\hline
& & \\
\hline
& & [tex]$\square$[/tex] \\
\hline
& \\
\hline
\end{tabular}
```

2. Analyze the Table Structure:
- The first row lists Flock X, Flock Y, and Flock Z with their respective bird counts.
- The second row is empty, indicating no additional data there.
- The third row has placeholders and the symbol [tex]$\square$[/tex], which we need to address.

3. Fill in the Blank:
- For the third row, if the goal is to find an unknown value represented by [tex]$\square$[/tex], we should consider the given answers for Flock X (123), Flock Y (99), and Flock Z (78).

Given the numerical values:
- The value for Flock Z is 78, which is the [tex]$\square$[/tex] we are supposed to fill.

Therefore, the detailed solution table should look like this:
```
\begin{tabular}{|l|l|l|}
\hline
Flock X & Flock Y & Flock Z \\
\hline
123 & 99 & 78 \\
\hline
& & \\
\hline
& & 78 \\
\hline
& \\
\hline
\end{tabular}
```

In conclusion:
- Flock X has 123 birds.
- Flock Y has 99 birds.
- Flock Z has 78 birds.

The placeholder [tex]$\square$[/tex] is filled with the correct number of birds in Flock Z, which is 78. This completes our detailed analysis and solution of the table.