Answer:
TACGTACGTTAC (so the second one)
Animals use this type of physical act to reproduce another type of their species. Mostly to impress or make the type of gender to fall in love.
I think the correct answer from the choices listed above is the first option. The abiotic component that would most likely change in a shallow ocean ecosystem during upwelling would be an increase in oxygen content. Hope this answers the question. Have a nice day.