Which organism in this food chain is a producer?

Grass > Grasshopper > Spider > Bird > Bacteria and Fungi

Question 1 options:

Grasshopper

Spider

Grass

Bird

there are so many examples for that in different areas, like biology experiment carried out in our lab recently.

here's one link:

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