Question

Eli's hobbies include jogging, swimming, and
a)to climb mountains
b)climb mountains
c)to climb
d)climbing mountains

Answer 1

La respuesta es la d) climbing mountains.

Answer 2

La opción correcta es la "d": Eli's hobbies include jogging, swimming and climbing mountains.

Es gerundio, ya que nombran actividades y siempre finalizan en "ing".