Explanation:

To determine how much canvas is needed to make the conical tent, we need to calculate the surface area of the cone excluding the base.

- Surface Area of Cone: The formula is $\pi rl$, where $r$ is the radius and $l$ is the slant height.

- Radius (r): Given as 6 units.

- Height (h): Given as 8 units.

- Slant Height (l): Calculated using Pythagoras' theorem, $l=\sqrt{r^2+h^2}=\sqrt{6^2+8^2}=\sqrt{36+64}=\sqrt{100}=10$.

- Canvas Needed: Multiply $\pi$, radius, and slant height, $\pi \times 6\times 10=60\pi$. Approximating $\pi$ to 3.14, the area is $60\times 3.14=188.4$.

- Verdict:

- Option 1 (188.57 units): Close to the calculated value.

- Option 2 (155.87 units): Too low.

- Option 3 (166.57 units): Also too low.

- Option 4 (177.55 units): Lower than calculated value.

The closest and most reasonable option is Option 1 (188.57 units).

The correct answer is Option 1 (188.57 units).