Question

1. which statement is disproved by a counterexample? each triangle has 3 sides. every circle has a center. all sunflowers are yellow. all squares have four sides.

Explanation:

A counter - example is an example that disproves a statement. Triangles always have 3 sides, circles always have a center, and squares always have four sides. However, there are sunflowers that are not yellow (e.g., red or brown - tinted sunflowers), which serves as a counter - example to the statement "All sunflowers are yellow".

Answer:

All sunflowers are yellow.