Answer:
The most appropriate answer would be b. gene flow at work.
Transfer of pollen grain forms the example of vertical gene transfer that is, transfer of a gene from parent to the offspring.
A pollen grain is the male gamete of the parent plant. It contains the genetic material or information of the plant.
It is pollinated or transferred to the stigma of the plant of same species with the help of air, water, bees et cetera. Successful pollination results in the formation of the zygote.
Thus, gene or genetic material is transferred from parent plant to the offspring. Hence, the student can use "gene flow at work" as the caption of the picture.
Pendulum works on the bases that the kinetic energy is transferred into the next object and that energy cannot be created but only transferred (basic stuff), as long as the kinetic energy isn't lost, it'll swing forever however this isn't true. The Kinetic energy can be transformed into sound energy and heat energy thus it'll eventually run out of energy.
The mitochondrion produces ATP during cell respiration.
