Question

1. what protist was responsible for the irish potato famine in the 1840s?

protozoa
brown algae
slime mold
water mold

Explanation:

The Irish potato famine in the 1840s was caused by a water mold named Phytophthora infestans. This organism infects potato plants, leading to the rotting of tubers. Protozoa are single - celled animal - like protists, brown algae are photosynthetic marine protists, and slime molds have different ecological roles (like decomposers in some cases) that are not related to the potato famine.

Answer:

water mold