Oho is a polite but less honorific form of Opo, which means “yes.”

Compare the following Tagalog words, which mean “Yes.”

1. Oo.

2. Oho.

3. Opo. 

Use #1 with people your age,
#3 with the elderly, and
#2 with older people you are on a familiar basis with.

Oo. Oho. Opo. 
Yes. Yes. Yes.