Answer:
He/she/it is climbing.
Explanation:
Third person is describing a character using "he", "she" or "it". There is no "I" or "me" or "my". It is present; happening at the very moment. So "I am climbing the mountain (right now)." Progressive-moving along; going to finish up-in the process of doing.
Answer:
Calculate the speed of a wave that has a wavelength of 8 meters and a frequency of 16 meters per second (m/s).
Either "By 2007, more Americans lived in or near cities than they did in rural areas." or "<span>Even today, the need for work is a common reason people move to urban areas."</span>
