What is an organelle? A. the basic building block of living things; the smallest piece of every organism that has all of the characteristics of a living
thing and can perform all life functions

B. one small part in or around a cell that has a very specialized job or function

C. structure, such as a heart or a leaf, made up of different types of tissues that all work together.
D. the smallest unit of an element that can be considered that element; they make up all matter

A

Explanation:

The basic building block of living things; the smallest piece of every organism that has all of the characteristics of a living  thing and can perform all life functions, An organelle is a subcellular structure that has one or more specific jobs to perform in the cell, much like an organ does in the body.

answer: enthalpy

explanation:

for a exothermic reaction, the energy is released i.e. the energy of the products is lower than the energy of the reactants.

= enthaply

= energy of products

= energy of reactants

as , thus comes out to be negative. negative value of enthalpy shows that the reaction is exothermic.

the answer is d. 74.02