In Activity A, you explored photosynthesis in a pond. The dissolved oxygen in a pond is produced by pond plants and algae (small, plant-like organisms) in a process called
photosynthesis.
What is the source of energy that is present during the time that photosynthesis takes
place?

Photons

Explanation:

Photons are the only source of energy for photosynthesis. Photons are absorbed by chlorophyll molecules within Photosystems I and II (and antennae complexes), generating higher-energy ‘excited’ states of the photosystems which can carry out energetically costly chemical reactions.

i am thinking the sun is the answer because the sun is usually the main source of energy that is included in photosynthesis

i believe the answer is a or 1

when the displaced particles are perpendicular to the direction the wave travels, is called a transverse wave, whereas in longitudinal wave the displace practices are parallel to the direction of the wave.

in the given image:

first image shows - longitudinal wave

second image shows - transverse wave

third image shows - longitudinal wave

fourth image shows - longitudinal wave