The answer is D: red hexagon.

The rule
The pattern repeats every 2 things: teal square, red hexagon. Then it starts again from the beginning.
The pattern as Python code
Here is a tiny Python program that follows the same rule. Type it into IDLE and run it to print the whole pattern, including the answer.
pattern = ["teal square", "red hexagon"]
for position in range(8):
print(position + 1, pattern[position % len(pattern)])
When you run it, Python prints:
1 teal square 2 red hexagon 3 teal square 4 red hexagon 5 teal square 6 red hexagon 7 teal square 8 red hexagon
Pixel says: Try changing a number in the code and run it again. Can you make the pattern go on for 20 steps? Meow!