Information that most readers are likely to know
1. Infinitive tense is the verb in the 'to' form, so you got it right there: to climb.
2. Third person singular present tense is the present tense plus the letter 's' at the end because it is in third person.: climbs
3. Past tense is something that happened in the past: climbed
4. Participle is like the -ing form.: climbing
Subject
Easy way to remember is to find the verb and ask who or what
In this it would be who or what was late? The answer would be you.
A, she’s trying to convey to her audience in a personal trustful way.