PLEASE HELP Which statement is true about the forces involved in an ornithopter and a pterosaur taking off

a

Gravity acts on both the ornithopter and the pterosaur.

b

Drag acts only on the ornithopter and not on the pterosaur.

c

Thrust resists the motion of the pterosaur and the ornithopter.

d

Lift is the single major factor in the forward movement of the ornithopter.

a

explanation:

clumped distribution, because you'de have all of the population gathered in a relatively small are.

it's the most common because it provides protection and a mate for reproduction

example: humans, seeweed, cattles, etc.

photosynthesis makes the glucose that is used in cellular respiration to make atp. the glucose is then turned back into carbon dioxide, which is used in photosynthesis. while water is broken down to form oxygen during photosynthesis, in cellular respiration oxygen is combined with hydrogen to form water.

answer; three;