Can’t someone please help me with this question

What causes the force that pushes magma from the magma chamber through the pipe and vent of a volcano?

Hummingbirds drink nectar from flowers, while robins eat plant seeds. what does this reduce?

Which of the following statements is true? a. there are more chromosomes in an organism than there are genes. b. there are more genes in an organism that there are chemical bases. c. dna is made of sugar, phosphate, and carbon. d. genes are found in specific locations on a chromosome.