Can anyone please answer questions 1 and 2?

Which part of the neuron below is indicated by the arrow, and what is its function? hormones send chemical signals throughout the body to regulate other body processes. hormones are chemical signals that are sent throughout the body to regulate other body processes. hormones send electrical signals throughout the body to regulate other body processes. hormones are electrical signals that are sent throughout the body to regulate other body processes.

At which point is crust neither created nor destroyed? island chain mid-ocean ridge divergent boundary transform boundary

Which of the following are causes of evolutionary change? 1)genetic drift 2) natural selection 3) gene flow 4)mutation