Ответ:

1.

a. The verbs describe actions

b. Present Continuous

2.

b. is talking

c. is making

d. is ticking

e. are singing

f. is falling

g. is laughing

h. are chatting

3.

a. The verbs describe states

b. Present Simple

c. Yes, sometimes it is possible in some cases

4.

c. has (state)

d. is having (action)

e. looks (state)

f. is looking (action)

g. likes (state)

h. knows (state)