Question

1. which nasa mission visited pluto in 2015? new horizons voyager ii curiosity voyager i

Explanation:

The New Horizons mission was launched by NASA to study Pluto and its moons. It reached Pluto in 2015. Voyager II and Voyager I are older missions that explored the outer planets but did not visit Pluto in 2015. Curiosity is a Mars rover and not related to Pluto exploration.

Answer:

New Horizons