Which fungus affects the american chestnut

Cryphonectria parasitica  

Explanation:

The American chestnut tree was practically eliminated in the early 1900s by the cancer of the chestnut tree, caused by a fungus originally called Endothia parasitica but renamed Cryphonectria, a disease probably from Asia that swept through the forests, causing one of the country's worst ecological disasters.

The American chestnut is native to the Appalachian forests in the eastern part of the United States. The trees have columnar trunks, reaching heights of up to 40 m, with diameters from 90 to 150 cm. The chestnuts are small, around 5 g, about 77 chestnuts/kg, but with excellent flavor and easy removal of the film and are covered with thick, clear bristles. There are reports about the superiority and versatility of its wood in relation to other species.

B. Pig and sheep

Explanation: